Chapter 6. Electronic Structure of Atoms
|
|
- Kathryn Holland
- 6 years ago
- Views:
Transcription
1 Chapter 6 Electronic Structure of Atoms
2 Electronic Structure Electronic structure the arrangement and energy of electrons 1 st lets talk about waves Why? Extremely small particles have properties that can only be explained by learning about waves 2
3 Waves Wavelength ( ) Distance between corresponding points on adjacent waves is the Frequency ( ) Number of waves passing a given point per unit of time is the 2015 Pearson Education, Inc. 3
4 Waves Frequency ( ) Waves traveling at the same velocity Wavelength inversely proportional to frequency 1/ Ȣ Units is s -1 Measure by counting number of waves passing through a certain point What is the frequency of the figures if time is 1 second? Figure (a): 2 s 1 Figure (b): 4 s Pearson Education, Inc. 4
5 Electromagnetic Radiation Understanding the nature of electromagnetic radiation helps to understand the electronic structure of atoms Electromagnetic radiation Form of energy Called radiant energy or optical energy Different types Propagating (moving) forms of energy Wavelike characteristics Travel at the speed of light (c) is m/s c = 5
6 Example Wavelength and Frequency Calculate the wavelength (in nm) of the red light emitted by a barcode scanner that has a frequency of s 1. Solution You are given the frequency of the light and asked to find its wavelength. GIVEN = 4.26 x s -1 FIND wavelength Use the equation that relates speed of light to frequency and wavelength and solve for wavelength. You can convert the wavelength from meters to nanometers by using the conversion factor between the two (1 nm = 10 9 m). 6
7 The Nature of Energy Wave nature of light does not explain how an object can glow when its temperature increases 2015 Pearson Education, Inc. 7
8 The Nature of Energy Quanta Max Planck explained Energy is quantized subdivide into small but measurable increments Energy comes in packets called quanta (singular: quantum) Energy can be gained or lost only in whole number multiples of h h is Planck s constant h = x J. s DE = h 2015 Pearson Education, Inc. 8
9 The Photoelectric Effect Observations about the photoelectric effect Metal emits electrons upon exposure to electromagnetic radiation Each metal has a frequency at which it ejects electrons At lower frequency, electrons are not emitted At higher frequency Emittance of electrons increases with light intensity Kinetic energy of emitted electrons increases linearly with frequency of light 2015 Pearson Education, Inc. Copyright Cengage Learning. All rights reserved 9
10 The Photoelectric Effect Albert Einstien Proposed electromagnetic radiation is quantized View electromagnetic radiation as particles called photons Energy of each photon E = h E = hc/ h is Planck s constant, J s 2015 Pearson Education, Inc. 10
11 The Photoelectric Effect Albert Einstien Energy has dual nature of light Has properties of wave and particulate matter Known as wave-particle duality Energy has mass E =mc 2 Mass of photon m =h/ c Copyright Cengage Learning. All rights reserved 11
12 Example Photon Energy A nitrogen gas laser pulse with a wavelength of 337 nm contains 3.83 mj of energy. How many photons does it contain? SORT You are given wavelength and total energy of a light pulse and asked to find the number of photons it contains. STRATEGIZE In the first part of the conceptual plan, calculate the energy of an individual photon from its wavelength. GIVEN E pulse = 3.83 mj λ = 337 nm FIND number of of photons CONCEPTUAL PLAN In the second part, divide the total energy of the pulse by the energy of each photon to determine the number of photons in the pulse (because the total energy of the pulse is equal to the sum of the energies of each photon). RELATIONSHIPS USED E = hc/λ 12
13 Example Photon Energy (continued) SOLVE To execute the first part of the conceptual plan, convert the wavelength to meters and substitute it into the equation to calculate the energy of a 337-nm photon. To execute the second part of the conceptual plan, convert the energy of the pulse from mj to J. SOLUTION E pulse = Then divide the energy of the pulse by the energy of a photon to obtain the number of photons. 13
14 The Wave Nature of Matter Louis de Broglie Theorized that matter should exhibit wave properties Demonstrated the relationship between mass and wavelength The wave nature of light is used to produce this electron micrograph = h mv 2015 Pearson Education, Inc. 14
15 Example De Broglie Wavelength Calculate the wavelength of an electron traveling with a speed of m/s. SORT You are given the speed of an electron and asked to calculate its wavelength. STRATEGIZE The conceptual plan shows how the de Broglie relation relates the wavelength of an electron to its mass and velocity. SOLVE Substitute the velocity, Planck s constant, and the mass of an electron into de Broglie relation to calculate the electron s wavelength. To correctly cancel the units, break down the J in Planck s constant into its SI base units (1 J = 1 kg m 2 /s 2 ). GIVEN ν = m/s. FIND λ CONCEPTUAL PLAN RELATIONSHIPS USED λ = h/mv (de Broglie relation) SOLUTION 15
16 Atomic Emissions How do atoms and molecules emit energy? 2015 Pearson Education, Inc. 16
17 Continuous vs. Line Spectra Continuous spectrum Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum Rainbow from a white light source Line spectrum Only discrete wavelengths is observed Each element has a unique line spectrum 2015 Pearson Education, Inc. 17
18 The Hydrogen Spectrum There are four lines in the hydrogen spectrum What does this mean? Only certain energies are allowed for the electron in the hydrogen atom Energy of the electron in the hydrogen atom is quantized 2015 Pearson Education, Inc. 18
19 Concept Check 1. Why is it significant that the color emitted from the hydrogen emission spectrum is not white? Shows that it is not a continuous spectrum. If continuous we would see a white light, which contains all colors. 2. How does the emission spectrum support the idea of quantized energy levels? Since only certain colors are observed, this means that only certain energy levels are allowed. An electron can exist at one level or another, and there are regions of zero probability in between. 19
20 The Bohr Model Niels Bohr adopted Planck s assumption and explained these phenomena in this way: 1. Electrons in an atom can only occupy certain circular orbitals (corresponding to certain energies) Copyright Cengage Learning. All rights reserved 20
21 The Bohr Model 2. Electrons in permitted orbits have specific, allowed energies 3. Energy is only absorbed or emitted in such a way as to move an electron from one allowed energy state to another 2015 Pearson Education, Inc. 21
22 The Bohr Model 2. Electrons in permitted orbits have specific, allowed energies 3. Energy is only absorbed or emitted in such a way as to move an electron from one allowed energy state to another 2015 Pearson Education, Inc. 22
23 Bohr Model Limitations Only works for hydrogen Circular motion is not wave-like in nature Points that are incorporated into the current atomic model include the following: 1) Electrons exist in discrete energy levels 2) Energy is involved in the transition of an electron from one level to another 23
24 QUANTUM MECHANICAL MODEL OF THE ATOM 24
25 The Uncertainty Principle Heisenberg showed you can not know both position and momentum of a particle (Dx) (Dmv) h Pearson Education, Inc. 25
26 Quantum Mechanics Quantum mechanics Developed by Erwin Schrödinger Mathematical equation which includes both the wave and particle nature of matter Solution of Schrödinger s wave equation is designated with a lowercase Greek psi ( ). 2, gives the electron density, or probability of where an electron is likely to be at any given time 2015 Pearson Education, Inc. 26
27 Quantum Numbers Quantum numbers describe the orbital Set of three Principal quantum number (n) Angular momentum quantum number (l) Magnetic quantum number (m l ) 27
28 Principal Quantum Number (n) Principal quantum number (n) Known as the electron shell Describes the energy level on which the orbital resides Correspond to the values in the Bohr model The values of n are integers 1 As n increases the electron is less tightly bound to the nucleus 3 rd shell 2 nd shell 1 st shell Nucleus 28
29 Angular Momentum Quantum Number (l) Angular momentum quantum number Called the subshell Defines the shape of the orbital Values of l are integers ranging from 0 to n 1 Use letter designations to communicate the different values of l, therefore, the shapes and types of orbitals 29
30 Magnetic Quantum Number (m l ) Magnetic quantum number describes the three-dimensional orientation of the orbital Allowed values of m l are integers ranging from l to l: l m l l Determines number of electron orbitals in each subshell Therefore, on any given energy level, there can be up to 1 s orbital, 3 p orbitals, 5 d orbitals, 7 f orbitals, and so forth 30
31 Magnetic Quantum Number (m l ) 2015 Pearson Education, Inc. 31
32 Example Quantum Numbers I What are the quantum numbers and names (for example, 2s, 2p) of the orbitals in the n = 4 principal level? How many n = 4 orbitals exist? Solution You first determine the possible n = 4; therefore l = 0, 1, 2, and 3 values of l (from the given value of n). You then determine the possible values of m l for each possible value of l. For a given value of n, the possible values of l are 0, 1, 2,..., (n 1). For a given value of l, the possible values of m l are the integer values including zero ranging from l to +l. The name of an orbital is its principal quantum number (n) followed by the letter corresponding to the value l. 32
33 ORBITAL SHAPES AND ENERGIES 33
34 s Orbitals s orbitals Value of l is 0 Spherical in shape Radius of the sphere increases with the value of n 2015 Pearson Education, Inc. 34
35 s Orbitals For an ns orbital Number of peaks is n Number of nodes is n 1 Node is where there is zero probability of finding an electron As n increases Electron density is more spread out Greater probability of finding an electron further from the nucleus 2015 Pearson Education, Inc. 35
36 p Orbitals p orbitals Value of l for p orbitals is 1 Composed of two lobes with a node between them 2015 Pearson Education, Inc. 36
37 d Orbitals d orbitals Value of l is 2 Four of the five d orbitals have four lobes Fifth resembles a p orbital with a doughnut around the center 2015 Pearson Education, Inc. 37
38 f Orbitals f orbitals Value of l is 3 Seven equivalent orbitals in a sublevel Copyright Cengage Learning. All rights reserved 38
39 Energies of Orbitals Hydrogen For hydrogen atom Orbitals on the same energy level have the same energy Called degenerate orbitals 2015 Pearson Education, Inc. 39
40 Energies of Orbitals Many-electron Atoms Atoms with more than one electron Not all orbitals on the same energy level are degenerate As number of electrons increase so does the repulsion between them Energy levels start to overlap in energy 4s is lower in energy than 3d 2015 Pearson Education, Inc. 40
41 Energies of Orbitals 41
42 Spin Magnetic Quantum Number, m s Spin Magnetic Quantum Number Fourth quantum number Two electrons in the same orbital do not have exactly the same energy Two allowed values, +½ and ½ The spin of an electron describes its magnetic field 2015 Pearson Education, Inc. 42
43 Pauli Exclusion Principle Pauli Exclusion Principle No two electrons in the same atom can have exactly the same energy No two electrons in the same atom can have identical sets of quantum numbers Every electron in an atom must differ by at least one of the four quantum number values: n, l, m l, and m s 43
44 STOP 44
45 Chapter 7 Section 1 PERIODIC TABLE 45
46 Development of the Periodic Table Modern Periodic Table Dmitri Mendeleev Lothar Meyer Independently came to the same conclusion about how elements should be grouped 46
47 Mendeleev and the Periodic Table Chemists mostly credit Mendeleev Organize the table by chemical properties Predicted some missing elements and their expected properties, i.e. germanium 47
48 Periodic Table Elements are arranged in order of atomic number 48
49 Periodic Table Representative elements Elements in the same group have similar chemical properties Why? 49
50 ELECTRON CONFIGURATION 50
51 Subatomic Particles in an Atom In a neutral atom the number of protons equal the number of electrons (protons and neutrons) Aufbau principle Electrons are added to orbitals as protons are added to an atom 2015 Pearson Education, Inc. 51
52 Electron Configurations 4p 5 Electron configuration explains how electrons are distributed in an atom Each component consists of a number denoting the energy level (principal quantum number, n) a letter denoting the type of orbital (angular momentum quantum number, l) a superscript denoting the number of electrons in those orbitals The most stable organization is the lowest possible energy, called the ground state 52
53 How do you determine an atoms electron configuration? 53
54 Electron Configuration Use the periodic table 54
55 Electron Configuration Subshell (angular momentum quantum number) s p d f Electron maximum columns 6 columns 10 columns 14 columns 55
56 Electron Configuration Subshell s p d f Electron maximum s p d f 56
57 Electron Configuration The periodic table can be used to determine subshell (angular momentum quantum number, l) s p d f 57
58 Electron Configuration All elements located in a group have distinguishing electron in the same subshell s 1 s 2 s 1 s 2 p 1 p 2 p 3 p 4 p 5 p 6 d 1 d 2 d 3 d 4 d 5 d 6 d 7 d 8 d 9 d 10 f 1 f 2 f 3 f 4 f 5 f 6 f 7 f 8 f 9 f 10 f 11 f 12 f 13 f 14 58
59 Electron Configuration Shell number equals period number 1 2 1s 2s Shell number equals period number minus one 2p 1s s 4s 5s 6s 7s 3d 4d 5d 6d 3p 4p 5p 6p 7p 6 7 4f 5f Shell number equals period number minus two 59
60 Electron Configurations Hydrogen (Z =1): 1s 1 Helium (Z =2): 1s 2 Lithium (Z =3): 1s 2 2s 1 Beryllium (Z =4): 1s 2 2s 2 Boron (Z =5): 1s 2 2s 2 2p 1 Carbon (Z =6): 1s 2 2s 2 2p 2 Iron (Z =26): 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6 Mercury (Z =80): 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 60
61 EXAMPLE ELECTRON CONFIGURATIONS Write electron configurations for each element. (a) Mg (a) Magnesium has 12 electrons. Distribute two of these into the 1s orbital, two into the 2s orbital, six into the 2p orbitals, and two into the 3s orbital. SOLUTION Mg 1s 2 2s 2 2p 6 3s 2 You can also write the electron configuration more compactly using the noble gas core notation. For magnesium, use [Ne] to represent 1s 2 2s 2 2p 6. 61
62 Electron Configurations of Ions Cations: The electrons are lost from the highest energy level (n value) K + is 4s 1 (losing a 4s electron) Al 3+ is 1s 2 2s 2 2p 6 (losing two 3s and 1 3p electrons) Anions: The electron configurations are filled to ns 2 np 6 P 3 is 1s 2 2s 2 2p 6 3s 2 3p 6 (gaining three electrons in 2p) 62
63 EXAMPLE ELECTRON CONFIGURATIONS Continued SKILLBUILDER PLUS Write electron configurations for each ion. (Hint: To determine the number of electrons to include in the electron configuration of an ion, add or subtract electrons as needed to account for the charge of the ion.) (a) Al 3+ (b) Cl Answers: Subtract 1 electron for each unit of positive charge. Add 1 electron for each unit of negative charge. (a) Al 3+ 1s 2 2s 2 2p 6 (b) 63
64 Electron Configuration The filled inner shell electrons are called core electrons Include completely filled d or f sublevels Electrons in the outer most shell are called valence electrons Elements in the same group of the periodic table have the same number of electrons in the outer most shell 64
65 EXAMPLE VALENCE ELECTRONS AND CORE ELECTRONS Write an electron configuration for selenium and identify the valence electrons and the core electrons. SOLUTION Write the electron configuration for selenium by determining the total number of electrons from selenium s atomic number (34) and distributing them into the appropriate orbitals. Se 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 4 The valence electrons are those in the outermost principal shell. For selenium, the outermost principal shell is the n = 4 shell, which contains 6 electrons (2 in the 4s orbital and 4 in the three 4p orbitals). All other electrons, including those in the 3d orbitals, are core electrons. 65
66 EXAMPLE VALENCE ELECTRONS AND CORE ELECTRONS Continued SKILLBUILDER Valence Electrons and Core Electrons Write an electron configuration for chlorine and identify the valence electrons and core electrons. Answer: 66
67 Conceptual Checkpoint Which element has the fewest valence electrons? (a) B (b) Ca (c) O (d) K (e) Ga Answer: 67
68 Conceptual Checkpoint Below is the electron configuration of calcium: Ca 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 In its reactions, calcium tends to form the Ca 2+ ion. Which electrons are lost upon ionization? (a) the 4s electrons (b) two of the 3p electrons (c) the 3s electrons (d) the 1s electrons Answer: 68
69 Condensed Electron Configurations Condensed electron configuration Shorthand electron configuration which uses brackets around a noble gas symbol and listing only valence electrons Atom Electron Configuration Condensed Configuration Helium (Z =2) 1s 2 Lithium (Z =3) 1s 2 2s 1 Beryllium (Z =4) 1s 2 2s 2 Boron (Z =5) 1s 2 2s 2 2p 1 Carbon (Z =6) 1s 2 2s 2 2p 2 Oxygen (Z =8) 1s 2 2s 2 2p 4 [He]2s 1 [He]2s 2 [He]2s 2 2p 1 [He]2s 2 2p 2 [He]2s 2 2p Pearson Education, Inc. 69
70 Condensed Electron Configurations Groups possess the same valence electron configuration 2015 Pearson Education, Inc. 70
71 EXAMPLE WRITING ELECTRON CONFIGURATIONS FROM THE PERIODIC TABLE Write a condensed electron configuration for arsenic based on its position in the periodic table. SOLUTION The noble gas that precedes arsenic in the periodic table is argon, so the inner electron configuration is [Ar]. Obtain the outer electron configuration by tracing the elements between Ar and As and assigning electrons to the appropriate orbitals. Remember that the highest n value is given by the row number (4 for arsenic). So, begin with [Ar], then add in the two 4s electrons as you trace across the s block, followed by ten 3d electrons as you trace across the d block (the n value for d subshells is equal to the row number minus one), and finally the three 4p electrons as you trace across the p block to As, which is in the third column of the p block: 71
72 EXAMPLE WRITING ELECTRON CONFIGURATIONS FROM THE PERIODIC TABLE Continued The electron configuration is: As [Ar]4s 2 3d 10 4p 3 SKILLBUILDER Writing Electron Configurations from the Periodic Table Use the periodic table to determine the condensed electron configuration for tin. Answer: 72
73 Electron configuration specifies subshell occupancy for electrons (angular momentum quantum number, l) What about the magnetic quantum number, m l? 2015 Pearson Education, Inc. 73
74 ELECTRON ORBITAL DIAGRAMS 74
75 Electron Orbital Diagrams Magnetic quantum number, m l Determines number of orbitals in each subshell Electron orbital diagram Shows number of electrons in occupied electron orbitals Each box in the diagram represents one orbital Half-arrows represent the electrons Direction of the arrow represents the relative spin of the electron (electron spin quantum number, m s Each orbital only holds 2 electrons 75
76 Electron Orbital Diagrams: Hund s Rule Hund s rule Every orbital in a subshell is singly occupied before any orbital is doubly occupied All of the electrons in singly occupied orbitals have the same spin Lowest energy attained when the number of electrons with the same spin is maximized For a set of orbitals in the same sublevel, there must be one electron in each orbital before pairing and the electrons have the same spin 76
77 EXAMPLE WRITING ORBITAL DIAGRAMS Write an orbital diagram for silicon. SOLUTION Since silicon is atomic number 14, it has 14 electrons. Draw a box for each orbital, putting the lowest-energy orbital (1s) on the far left and proceeding to orbitals of higher energy to the right. Distribute the 14 electrons into the orbitals, allowing a maximum of 2 electrons per orbital and remembering Hund s rule. The complete orbital diagram is: 77
78 Electron Orbital Diagrams Electron configuration specifies subshell occupancy for electrons (angular momentum quantum number, l) Electron orbital diagram specifies orbital occupancy for electrons 78
79 Electron Configuration Anomalies Some irregularities occur when there are enough electrons to half-fill s and d orbitals on a given row 79
80 Chromium as an Anomaly Electron configuration for chromium is [Ar] 4s 1 3d 5 rather than the expected [Ar] 4s 2 3d 4 This occurs because the 4s and 3d orbitals are very close in energy These anomalies occur in f-block atoms with f and d orbitals, as well 80
81 The Periodic Table Final Thoughts 1. Valence electrons that primarily determine an atom s chemistry 2. Electron configurations can be determined from the periodic table 3. Certain groups in the periodic table have special names 4. Basic division of the elements in the periodic table is into metals and nonmetals 81
82 82
83 What is the shape of a p orbital? A. Spherical B. Doughnut C. Pyramidal D. Dumbbell E. Square 83
84 How many orbitals are associated with a given set of d orbitals with the same principal quantum number? A. 1 B. 7 C. 3 D. 9 E. 5 84
85 What is the maximum number of electrons allowed in each f orbital? A. 2 B. 6 C. 8 D. 10 E
86 What is the maximum number of electrons in the n = 4 principal energy level? A. 6 B. 8 C. 18 D. 32 E
87 Which of the following electron configurations is NOT possible? A. 1s 2 2s 2 2p 3 B. [Ar]4s 2 4d 10 4p 4 C. [Ne]3s 2 D. [He]2s 2 2p 6 3s 2 E. [Kr]5s 2 4d 10 5p 2 87
88 What is the electron configuration for the copper atom? A. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 B. [Ar]4s 2 4d 9 C. [Ar]4s 1 3d 10 D. 1s 2 2s 2 2p 2 E. [Ar]4s 2 3d 9 88
89 How many unpaired electrons are in an iron atom? A. 6 B. 20 C. 4 D. 1 E. 0 89
90 Which of the following atoms has the greatest metallic character? A. Chlorine B. Tellurium (Te) C. Indium (In) D. Carbon E. Aluminum 90
91 The electron configuration for calcium is 1s 2 2s 2 2p 6 3s 2. Which electrons are lost upon ionization? A. The 3s electrons B. The 2s electrons C. Two of the 2p electrons D. The 1s electrons E. None of the above 91
92 The lowest energy state of a hydrogen atom is called its state. a. bottom b. ground c. fundamental d. original 92
93 s orbitals are shaped like a. four-leaf clovers. b. dumbbells. c. spheres. d. triangles. 93
94 At a node, the probability of finding an electron is %. a. 0 b. 1 c. 50 d
95 What is the maximum number of electrons that can occupy the 5d subshell a. 2 b. 6 c. 10 d
96 Conceptual Checkpoint Which pair of elements has the same total number of electrons in p orbitals? (a) Na and K (b) K and Kr (c) P and N (d) Ar and Ca Answer: 96
97 Which of the following elements has the following electron configuration 1s 2 2s 2 2p 6 3s 2 3p 5? A. O B. Cl C. F D. Ar E. S 97
98 What is the electron configuration of the ground state of the P 3 ion? A. [Ar]4s 2 3d 10 4p 1 B. [Ne]3s 2 3p 6 C. [He]2s 2 2p 6 3s 2 D. [Ne]3s 2 3p 3 E. [Ne]3s 2 98
99 What is the electron configuration for sulfur? A. [Ar]4s 2 4p 5 B. [Ne]3s 2 3p 4 C. 1s 2 2s 2 2p 6 3s 2 3p 4 D. 1s 2 2s 2 2p 6 3s 2 3p 5 E. Two of the above 99
100 Which of the following ions has the same electron configuration as an argon atom? A. Br B. K + C. S 3 D. P 3+ E. Ca + 100
101 How many core electrons are in an arsenic (element 33) atom? A. 33 B. 28 C. 18 D. 5 E
102 Which element forms compounds with formulas similar to compounds containing iodine? A. Ar B. S C. Na D. P E. F 102
103 The electron configuration for bromine is [Ar]4s 2 3d 10 4p 5. List the number of core electrons and valence electrons, respectively. A. 18 and 17 B. 20 and 15 C. 10 and 25 D. 28 and 7 E. 30 and 5 103
104 The electron configuration of a carbon atom is a. [He]2s 2 2p 6. b. [He]2s 2 2p 4. c. [He]2s 2 2p 2. d. [He]2s
105 The electron configuration of a germanium atom is a. [Ar]4s 2 4p 2. b. [Ar]4s 2 3d 10 4p 2. c. [Kr]4s 2 3d 10 4p 2. d. [Kr]4s 2 3d 10 4p
106 The electron configuration of a copper atom is a. [Ar]4s 2 3d 9. b. [Ar]4s 1 3d 10. c. [Ar]4s 2 3d 10. d. [Ar]4s 2 3d
107 The valence electron configuration of elements in column 6A(16) of the Periodic Table is a. np 6. b. ns 0 np 6. c. ns 2 np 4. d. impossible to predict because each element is unique. 107
108 Identify the specific element that corresponds to 1s 2 2s 2 2p 6 3s 2 a. Sodium b. Beryllium c. Magnesium d. Calcium 108
109 Identify the specific element that corresponds to [Kr]5s 2 4d 10 5p 4 a. tin b. antimony c. tellurium d. Iodine 109
110 The elements located in Group VIIA (Group 17) on the periodic table are called a. alkali metals. b. noble gases. c. chalcogens. d. halogens. 110
111 Identify the group of elements that corresponds to the generalized electron configuration [noble gas] ns 2 np 5 a. Group 5A b. Group 6A c. Group 7A d. Group 8A 111
112 Identify the group of elements that corresponds to the generalized electron configuration [noble gas] ns 2 (n-1)d 2 a. Group 3B b. Group 4B c. Group 5B d. Group 6B 112
Chapter 6. Electronic. Electronic Structure of Atoms Pearson Education
Chapter 6 Laser: step-like energy transition 6.1 The Wave Nature of Light 6.2 Quantized Energy and Photons 6.3 Line Spectra and the Bohr Model 6.4 The Wave Behavior of Matter 6.5 Quantum Mechanics and
More informationChapter 6. Electronic Structure of Atoms. Lecture Presentation. John D. Bookstaver St. Charles Community College Cottleville, MO
Lecture Presentation Chapter 6 John D. Bookstaver St. Charles Community College Cottleville, MO Waves To understand the electronic structure of atoms, one must understand the nature of electromagnetic
More informationElectromagnetic Radiation All electromagnetic radiation travels at the same velocity: the speed of light (c), m/s.
Chapter 6 Electronic Structure of Atoms Waves To understand the electronic structure of atoms, one must understand the nature of electromagnetic radiation. The distance between corresponding points on
More informationChapter 6: Electronic Structure of Atoms
Chapter 6: Electronic Structure of Atoms Learning Outcomes: Calculate the wavelength of electromagnetic radiation given its frequency or its frequency given its wavelength. Order the common kinds of radiation
More informationChapter 6 Electronic Structure of Atoms. 許富銀 ( Hsu Fu-Yin)
Chapter 6 Electronic Structure of Atoms 許富銀 ( Hsu Fu-Yin) 1 The Wave Nature of Light The light we see with our eyes, visible light, is one type of electromagnetic radiation. electromagnetic radiation carries
More informationClassify each of these statements as always true, AT; sometimes true, ST; or never true, NT.
ELECTRONS IN ATOMS Chapter Quiz Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT. 1. The orbitals of a principal energy level are lower in energy than the orbitals
More informationChapter 6. of Atoms. Chemistry, The Central Science, 10th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten
Chemistry, The Central Science, 10th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Chapter 6 John D. Bookstaver St. Charles Community College St. Peters, MO 2006, Prentice Hall,
More informationChapter 6. of Atoms. Waves. Waves 1/15/2013
Chemistry, The Central Science, 10th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Chapter 6 John D. Bookstaver St. Charles Community College St. Peters, MO 2006, Prentice Hall,
More informationChemistry 11. Unit 8 Atoms and the Periodic Table Part II Electronic Structure of Atoms
Chemistry 11 Unit 8 Atoms and the Periodic Table Part II Electronic Structure of Atoms 2 1. Atomic number and atomic mass In the previous section, we have seen that from 50 to 100 years after Dalton proposed
More informationChemistry 111 Dr. Kevin Moore
Chemistry 111 Dr. Kevin Moore Black Body Radiation Heated objects emit radiation based on its temperature Higher temperatures produce higher frequencies PhotoElectric Effect Light on a clean metal surface
More informationWhite Light. Chapter 7 Electron Structure of the Atom
Chapter 7 Electron Structure of the Atom Electromagnetic Radiation and Energy The Bohr Model of the Hydrogen Atom The Modern Model of the Atom Periodicity of Electron Configurations Valence Electrons for
More informationChapter 4. Table of Contents. Section 1 The Development of a New Atomic Model. Section 2 The Quantum Model of the Atom
Arrangement of Electrons in Atoms Table of Contents Section 1 The Development of a New Atomic Model Section 2 The Quantum Model of the Atom Section 3 Electron Configurations Section 1 The Development of
More informationTest bank chapter (7)
Test bank chapter (7) Choose the most correct answer 1. The lowest energy state of an atom is referred to as its a) bottom state. b) ground state. c) fundamental state. d) original state. 2. All s orbitals
More information#9 Modern Atomic Theory Quantitative Chemistry
Name #9 Modern Atomic Theory Quantitative Chemistry Student Learning Map Unit EQ: What is the current model of the atom? Key Learning: The current model of the atom is based on the quantum mechanical model.
More informationExplain the mathematical relationship among the speed, wavelength, and frequency of electromagnetic radiation.
Preview Objectives Properties of Light Wavelength and Frequency The Photoelectric Effect The Hydrogen-Atom Line-Emission Spectrum Bohr Model of the Hydrogen Atom Photon Emission and Absorption Section
More informationName: Electrons in Atoms Chemical Periodicity Chapters 13 and 14
Name: Electrons in Atoms Chemical Periodicity Chapters 13 and 14 1 Chapter 13 Electrons in Atoms We need to further develop our understanding of atomic structure to help us understand how atoms bond to
More informationCh. 4 Sec. 1-2, Ch. 3 sec.6-8 ENERGY CHANGES AND THE QUANTUM THEORY THE PERIODIC TABLE
Ch. 4 Sec. 1-2, Ch. 3 sec.6-8 ENERGY CHANGES AND THE QUANTUM THEORY THE PERIODIC TABLE What Makes Red Light Red? (4.1) Electromagnetic Radiation: energy that travels in waves (light) Waves Amplitude: height
More informationC H E M 1 CHEM 101-GENERAL CHEMISTRY CHAPTER 6 THE PERIODIC TABLE & ATOMIC STRUCTURE INSTR : FİLİZ ALSHANABLEH
C H E M 1 CHEM 101-GENERAL CHEMISTRY CHAPTER 6 THE PERIODIC TABLE & ATOMIC STRUCTURE 0 1 INSTR : FİLİZ ALSHANABLEH CHAPTER 6 THE PERIODIC TABLE & ATOMIC STRUCTURE The Electromagnetic Spectrum The Wave
More informationChapter 2. Atomic Structure and Periodicity
Chapter 2 Atomic Structure and Periodicity Chapter 2 Table of Contents (2.1) (2.2) (2.3) (2.4) (2.5) (2.6) (2.7) (2.8) (2.9) Electromagnetic radiation The nature of matter The atomic spectrum of hydrogen
More informationChapter 4 Arrangement of Electrons in Atoms. 4.1 The Development of a New Atomic Model
Chapter 4 Arrangement of Electrons in Atoms 4.1 The Development of a New Atomic Model Properties of Light Electromagnetic Radiation: EM radiation are forms of energy which move through space as waves There
More informationSample Exercise 6.1 Concepts of Wavelength and Frequency
Sample Exercise 6.1 Concepts of Wavelength and Frequency Two electromagnetic waves are represented in the margin. (a) Which wave has the higher frequency? (b) If one wave represents visible light and the
More informationElectrons in Atoms. Section 5.1 Light and Quantized Energy
Name Date Class 5 Electrons in Atoms Section 5.1 Light and Quantized Energy In your textbook, read about the wave nature of light. Use each of the terms below just once to complete the passage. amplitude
More informationChapter 6. Electronic Structure of Atoms. Lecture Presentation. John D. Bookstaver St. Charles Community College Cottleville, MO
Lecture Presentation Chapter 6 Electronic Structure of Atoms John D. Bookstaver St. Charles Community College Cottleville, MO Waves Waves are periodic disturbances they repeat at regular intervals of time
More informationChapter 6 Electronic structure of atoms
Chapter 6 Electronic structure of atoms light photons spectra Heisenberg s uncertainty principle atomic orbitals electron configurations the periodic table 6.1 The wave nature of light Visible light is
More informationAP Chapter 6 Study Questions
Class: Date: AP Chapter 6 Study Questions True/False Indicate whether the statement is true or false. 1. The wavelength of radio waves can be longer than a football field. 2. Black body radiation is the
More informationModern Atomic Theory and the Periodic Table
Modern Atomic Theory and the Periodic Table Chapter 10 the exam would have to be given earlier Hein and Arena Version 1.1 Eugene Passer Chemistry Department Bronx Community 1 College John Wiley and Sons,
More informationChapter 9. Blimps, Balloons, and Models for the Atom. Electrons in Atoms and the Periodic Table. Hindenburg. Properties of Elements Hydrogen Atoms
Chapter 9 Electrons in Atoms and the Periodic Table Blimps, Balloons, and Models for the Atom Hindenburg Blimps, Balloons, and Models for the Atom Properties of Elements Hydrogen Atoms Helium Atoms 1 Blimps,
More informationChapter 6 - Electronic Structure of Atoms
Chapter 6 - Electronic Structure of Atoms 6.1 The Wave Nature of Light To understand the electronic structure of atoms, one must understand the nature of electromagnetic radiation Visible light is an example
More information10 Modern Atomic Theory and the Periodic Table. Chapter Outline. ElectromagneDc RadiaDon. ElectromagneDc RadiaDon. ElectromagneDc RadiaDon
10 Modern Atomic Theory and the Periodic Table Chapter Outline 10.1 ElectromagneDc RadiaDon 10.2 The Bohr Atom 10.3 10.4 10.5 Electron Structures and the Periodic Table The amazing colors of fireworks
More informationName Date Class MODELS OF THE ATOM
5.1 MODELS OF THE ATOM Section Review Objectives Identify inadequacies in the Rutherford atomic model Identify the new assumption in the Bohr model of the atom Describe the energies and positions of electrons
More informationEarly Chemistry. Early Chemists only believed in 1 element: Dirt. Later Chemists believed in 4 elements:
Early Chemistry Early Chemists only believed in 1 element: Dirt Later Chemists believed in 4 elements: Air Earth Fire Water Various combinations of these produced various compounds Atomic Structure All
More informationChapter 5 Electrons In Atoms
Chapter 5 Electrons In Atoms 5.1 Revising the Atomic Model 5.2 Electron Arrangement in Atoms 5.3 Atomic Emission Spectra and the Quantum Mechanical Model 1 Copyright Pearson Education, Inc., or its affiliates.
More informationBecause light behaves like a wave, we can describe it in one of two ways by its wavelength or by its frequency.
Light We can use different terms to describe light: Color Wavelength Frequency Light is composed of electromagnetic waves that travel through some medium. The properties of the medium determine how light
More informationThe orbitals in an atom are arranged in shells and subshells. orbital 3s 3p 3d. Shell: all orbitals with the same value of n.
Shells and Subshells The orbitals in an atom are arranged in shells and subshells. n=3 orbital 3s 3p 3d Shell: all orbitals with the same value of n n=3 3s 3p 3d Subshell: all orbitals with the same value
More informationThe Electronic Structures of Atoms Electromagnetic Radiation The wavelength of electromagnetic radiation has the symbol λ.
CHAPTER 7 Atomic Structure Chapter 8 Atomic Electron Configurations and Periodicity 1 The Electronic Structures of Atoms Electromagnetic Radiation The wavelength of electromagnetic radiation has the symbol
More informationLight. Light (con t.) 2/28/11. Examples
Light We can use different terms to describe light: Color Wavelength Frequency Light is composed of electromagnetic waves that travel through some medium. The properties of the medium determine how light
More informationElectronic structure of atoms
Chapter 1 Electronic structure of atoms light photons spectra Heisenberg s uncertainty principle atomic orbitals electron configurations the periodic table 1.1 The wave nature of light Much of our understanding
More informationTest Review # 4. Chemistry: Form TR4-9A
Chemistry: Form TR4-9A REVIEW Name Date Period Test Review # 4 Location of electrons. Electrons are in regions of the atom known as orbitals, which are found in subdivisions of the principal energy levels
More informationCHAPTER 4. Arrangement of Electrons in Atoms
CHAPTER 4 Arrangement of Electrons in Atoms 4.1 Part I Development of a New Atomic Model 4.1 Objectives 1. Explain the mathematical relationship among the speed, wavelength, and frequency of electromagnetic
More informationNotes: Unit 6 Electron Configuration and the Periodic Table
Name KEY Block Notes: Unit 6 Electron Configuration and the Periodic Table In the 1790's Antoine Lavoisier compiled a list of the known elements at that time. There were only 23 elements. By the 1870's
More informationAP Chemistry A. Allan Chapter 7 Notes - Atomic Structure and Periodicity
AP Chemistry A. Allan Chapter 7 Notes - Atomic Structure and Periodicity 7.1 Electromagnetic Radiation A. Types of EM Radiation (wavelengths in meters) 10-1 10-10 10-8 4 to 7x10-7 10-4 10-1 10 10 4 gamma
More informationCHEMISTRY Matter and Change
CHEMISTRY Matter and Change Chapter 5: Electrons in Atoms 5 Section 5.1 Section Section 5.3 Table Of Contents Light and Quantized Energy Electron Configuration Compare the wave and particle natures of
More informationElectron Configurations
Section 3 Electron Configurations Key Terms electron configuration Pauli exclusion principle noble gas Aufbau principle Hund s rule noble-gas configuration Main Ideas Electrons fill in the lowest-energy
More informationSection 11: Electron Configuration and Periodic Trends
Section 11: Electron Configuration and Periodic Trends The following maps the videos in this section to the Texas Essential Knowledge and Skills for Science TAC 112.35(c). 11.01 The Bohr Model of the Atom
More informationChapter 6: The Electronic Structure of the Atom Electromagnetic Spectrum. All EM radiation travels at the speed of light, c = 3 x 10 8 m/s
Chapter 6: The Electronic Structure of the Atom Electromagnetic Spectrum V I B G Y O R All EM radiation travels at the speed of light, c = 3 x 10 8 m/s Electromagnetic radiation is a wave with a wavelength
More informationChapter 7. Atomic Structure and Periodicity. Copyright 2018 Cengage Learning. All Rights Reserved.
Chapter 7 Atomic Structure and Periodicity Chapter 7 Table of Contents (7.1) (7.2) Electromagnetic radiation The nature of matter (7.3) The atomic spectrum of hydrogen * (7.4) The Bohr model * (7.5) (7.6)
More informationElectronic structure the number of electrons in an atom as well as the distribution of electrons around the nucleus and their energies
Chemistry: The Central Science Chapter 6: Electronic Structure of Atoms Electronic structure the number of electrons in an atom as well as the distribution of electrons around the nucleus and their energies
More informationElectronic Structure and the Periodic Table. Unit 6 Honors Chemistry
Electronic Structure and the Periodic Table Unit 6 Honors Chemistry Wave Theory of Light James Clerk Maxwell Electromagnetic waves a form of energy that exhibits wavelike behavior as it travels through
More information5.1 Light & Quantized Energy
5.1 Light & Quantized Energy Objectives: 1. Describe electromagnetic (EM) wave properties & measures 2. Relate visible light to areas of the EM spectrum with higher & lower energy 3. Know the relationship
More informationMODERN ATOMIC THEORY AND THE PERIODIC TABLE
C10 04/19/2013 13:34:14 Page 114 CHAPTER 10 MODERN ATOMIC THEORY AND THE PERIODIC TABLE SOLUTIONS TO REVIEW QUESTIONS 1. Wavelength is defined as the distance between consecutive peaks in a wave. It is
More information1. Draw a wave below and label the following parts: peak, trough, wavelength and amplitude
Wave Nature of Light 1. Draw a wave below and label the following parts: peak, trough, wavelength and amplitude 2. Draw two waves with different frequencies and circle the wave that has a higher frequency.
More informationChapter 8: Electrons in Atoms Electromagnetic Radiation
Chapter 8: Electrons in Atoms Electromagnetic Radiation Electromagnetic (EM) radiation is a form of energy transmission modeled as waves moving through space. (see below left) Electromagnetic Radiation
More informationELECTRONS IN ATOMS AND THE PERIODIC TABLE. Light and Energy. Chapter Nine
ELECTRONS IN ATOMS AND THE PERIODIC TABLE Chapter Nine Light and Energy! Electromagnetic radiation (EM) is an especially important form of energy for scientific study.! Many types of radiant energy are
More informationChapter 2: The Structure of the Atom and the Periodic Table
Chapter 2: The Structure of the Atom and the Periodic Table 1. What are the three primary particles found in an atom? A) neutron, positron, and electron B) electron, neutron, and proton C) electron, proton,
More informationAtoms, Electrons and Light MS. MOORE CHEMISTRY
Atoms, Electrons and Light MS. MOORE CHEMISTRY Atoms Remember Rutherford??? What did he discover with his gold foil experiment. A: Atoms contain a dense nucleus where the protons and neutrons reside. ATOMS
More informationLight. October 16, Chapter 5: Electrons in Atoms Honors Chemistry. Bohr Model
Chapter 5: Electrons in Atoms Honors Chemistry Bohr Model Niels Bohr, a young Danish physicist and a student of Rutherford improved Rutherford's model. Bohr proposed that an electron is found only in specific
More information8. Which of the following could be an isotope of chlorine? (A) 37 Cl 17 (B) 17 Cl 17 (C) 37 Cl 17 (D) 17 Cl 37.5 (E) 17 Cl 37
Electronic Structure Worksheet 1 Given the following list of atomic and ionic species, find the appropriate match for questions 1-4. (A) Fe 2+ (B) Cl (C) K + (D) Cs (E) Hg + 1. Has the electron configuration:
More informationUnit 3: The Periodic Table and Atomic Theory
Name: Period: Unit 3: The Periodic Table and Atomic Theory Day Page # Description IC/HW 1 2-3 Periodic Table and Quantum Model Notes IC 1 4-5 Orbital Diagrams Notes IC 1 14 3-A: Orbital Diagrams Worksheet
More informationWhy Patterns for Charges of Common Cations and Anions? Electrons in Atoms
Electrons in Atoms From Light to Energy of Electrons in Atom Quantum mechanical description of Atom 1. Principal quantum number: Shell 2. Orientation (shape) of : Subshell 3. Orbitals hold electrons with
More informationElectronic Structure of Atoms and the Periodic table. Electron Spin Quantum # m s
Electronic Structure of Atoms and the Periodic table Chapter 6 & 7, Part 3 October 26 th, 2004 Homework session Wednesday 3:00 5:00 Electron Spin Quantum # m s Each electron is assigned a spinning motion
More informationName Chemistry-PAP Period. Notes: Electrons. Light travels through space as a wave. Waves have three primary characteristics:
Name Chemistry-PAP Period The Wave Nature of Light Notes: Electrons Light travels through space as a wave. Waves have three primary characteristics: Wavelength (λ): the distance between 2 consecutive crests
More informationCHAPTER 4 Arrangement of Electrons in Atoms
CHAPTER 4 Arrangement of Electrons in Atoms SECTION 1 The Development of a New Atomic Model OBJECTIVES 1. Explain the mathematical relationship among the speed, wavelength, and frequency of electromagnetic
More informationModern Atomic Theory. (a.k.a. the electron chapter!) Chemistry 1: Chapters 5, 6, and 7 Chemistry 1 Honors: Chapter 11
Modern Atomic Theory (a.k.a. the electron chapter!) 1 Chemistry 1: Chapters 5, 6, and 7 Chemistry 1 Honors: Chapter 11 ELECTROMAGNETIC RADIATION 2 Electromagnetic radiation. 3 4 Electromagnetic Radiation
More informationE J The electron s energy difference between the second and third levels is J. = J
The wavelength of light emitted is 654 nm. = c f c 3.00 10 8 m/s f c 3.00 108 m 1s 6.54 10 7 m f 4.59 4.59 10 14 z 1 s 10 14 The frequency of the light emitted is 4.59 10 14 z. E hf h 6.63 10 34 J/z E
More informationAtomic Structure and Periodicity
p. 99 p. 98 p. 98 Electromagnetic Spectrum Image Atomic Structure and Periodicity Chemistry Zumdahl Chapter 7 Properties of Light Electromagnetic Radiation: a form of energy that exhibits wavelike behavior
More information1. Ham radio operators often broadcast on the 6 meter band. The frequency of this electromagnetic radiation is MHz. a. 500 b. 200 c. 50 d. 20 e. 2.
Name: Score: 0 / 60 points (0%) [1 open ended question not graded] Chapters 6&7 Practice Exam Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Ham radio
More informationElectronic Structure. of Atoms. 2009, Prentice-Hall, Inc. Electronic Structure. of Atoms. 2009, Prentice-Hall, Inc. Electronic Structure.
Chemistry, The Central Science, 11th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Chapter 6 Section 1 6: The Marathon Adapted from: John D. Bookstaver St. Charles Community College
More informationPeriodicity and the Electronic Structure of Atoms 國防醫學院生化學科王明芳老師
Periodicity and the Electronic Structure of Atoms 國防醫學院生化學科王明芳老師 2018-10-2 1 2 Light and the Electromagnetic Spectrum Electromagnetic energy ( light ) is characterized by wavelength, frequency, and amplitude.
More informationModern Atomic Theory CHAPTER OUTLINE
Chapter 3B Modern Atomic Theory 1 CHAPTER OUTLINE Waves Electromagnetic Radiation Dual Nature of Light Bohr Model of Atom Quantum Mechanical Model of Atom Electron Configuration Electron Configuration
More informationArrangement of Electrons. Chapter 4
Arrangement of Electrons Chapter 4 Properties of Light -Light s interaction with matter helps to understand how electrons behave in atoms -Light travels through space & is a form of electromagnetic radiation
More informationTo review Rutherford s model of the atom To explore the nature of electromagnetic radiation To see how atoms emit light
Objectives To review Rutherford s model of the atom To explore the nature of electromagnetic radiation To see how atoms emit light 1 A. Rutherford s Atom.but there is a problem here!! 2 Using Rutherford
More informationChemistry- Unit 3. Section II - Chapter 7 ( , 7.11) Quantum Mechanics
Chemistry- Unit 3 Section II - Chapter 7 (7.6-7.8, 7.11) Quantum Mechanics Atomic Review What subatomic particles do you get to play with? Protons Neutrons Electrons NO! It would change the element Don
More informationThe Wave Nature of Light. Chapter Seven: Electromagnetic Waves. c = λν. λ and ν are inversely related
The Wave Nature of Light Chapter Seven: ATOMIC STRUCTURE & PERIODICITY Electromagnetic radiation is energy propagated by vibrating electric and magnetic fields. Electromagnetic radiation forms a whole
More information= proton (positive charge) = electron (negative charge) = neutron (no charge) A Z. ,, and are notations that represent isotopes of carbon.
ChemQuest 8 Name: Date: Hour: Information: Structure of the Atom Note the following symbols: (they are not to scale) = proton (positive charge) = electron (negative charge) = neutron (no charge) The following
More information4.2 WHERE are the electrons in the { atom???? QUANTUM NUMBERS
4.2 WHERE are the electrons in the { atom???? QUANTUM NUMBERS Bohr s Model Contradicts Common Sense If only certain orbits with definite energies are allowed and the electrons constantly gives off radiation,
More informationName AP CHEM / / Chapter 7 Outline Atomic Structure and Periodicity
Name AP CHEM / / Chapter 7 Outline Atomic Structure and Periodicity Electromagnetic Radiation One way energy travels through space is by electromagnetic radiation. The electromagnetic spectrum represents
More informationMendeleev s Periodic Law
Mendeleev s Periodic Law Periodic Law When the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically. Mendeleev s Periodic Law allows us to predict what
More informationUnit 4B- Electron Configuration- Guided Notes
Unit 4B- Electron Configuration- Guided Notes Atomic Structure Electrons are arranged in or around the nucleus of an atom o First shell can hold a maximum of electrons o Second shell can hold a maximum
More information: the smallest particle that has the properties of an element. In, this Greek philosopher suggested that the universe was made of.
Notes: ATOMS AND THE PERIODIC TABLE Atomic Structure: : the smallest particle that has the properties of an element. From the early concept of the atom to the modern atomic theory, scientists have built
More information6.4 Electronic Structure of Atoms (Electron Configurations)
Chapter 6 Electronic Structure and Periodic Properties of Elements 317 Orbital n l m l degeneracy Radial nodes (no.) 4f 4 3 7 0 4p 4 1 3 2 7f 7 3 7 3 5d 5 2 5 2 Check Your Learning How many orbitals have
More informationDevelopment of the Periodic Table. Chapter 5. Light and the EM Spectrum. Light
Chapter 5 Periodic Table Song Periodicity and Atomic Structure Development of the Periodic Table Mid-1800 s, several scientists placed known elements in order based on different criteria. Mendeleev s and
More informationChapter 7. Quantum Theory and the Electronic Structure of Atoms
Chapter 7 Quantum Theory and the Electronic Structure of Atoms This chapter introduces the student to quantum theory and the importance of this theory in describing electronic behavior. Upon completion
More informationWARM-UP. Draw each of the three models of the atom that we learned about last unit. Who came up with each? What was wrong with each?
WARM-UP Draw each of the three models of the atom that we learned about last unit. Who came up with each? What was wrong with each? 1:59 1:58 1:57 1:56 1:55 1:54 1:53 1:52 1:51 1:50 1:49 1:48 1:47 1:46
More informationNote that the protons and neutrons are each almost 2,000 times more massive than an electron; What is the approximate diameter of an atom?
Atomic Structure and the Periodic Table Evolution of Atomic Theory The ancient Greek scientist Democritus is often credited with developing the idea of the atom Democritus proposed that matter was, on
More informationThe Electron Cloud. Here is what we know about the electron cloud:
The Electron Cloud Here is what we know about the electron cloud: It contains the subatomic particles called electrons This area accounts for most of the volume of the atom ( empty space) These electrons
More informationCHEMISTRY - KIRSS 2E CH.3 - ATOMIC STRUCTURE: EXPLAINING THE PROPERTIES OF ELEMENTS
!! www.clutchprep.com CONCEPT: THE NATURE OF LIGHT Visible light represents a small portion of the continuum of radiant energy known as. The visible light spectrum ranges from to. Its wave properties of
More informationElectrons in Atoms. Section 5.1 Light and Quantized Energy Section 5.2 Quantum Theory and the Atom Section 5.3 Electron Configuration
Electrons in Atoms Section 5.1 Light and Quantized Energy Section 5.2 Quantum Theory and the Atom Section 5.3 Electron Configuration Click a hyperlink or folder tab to view the corresponding slides. Exit
More informationNotes: Electrons and Periodic Table (text Ch. 4 & 5)
Name Per. Notes: Electrons and Periodic Table (text Ch. 4 & 5) NOTE: This set of class notes is not complete. We will be filling in information in class. If you are absent, it is your responsibility to
More informationUNIT (2) ATOMS AND ELEMENTS
UNIT (2) ATOMS AND ELEMENTS 2.1 Elements An element is a fundamental substance that cannot be broken down by chemical means into simpler substances. Each element is represented by an abbreviation called
More informationQuantum Theory & Electronic Structure of Atoms. It s Unreal!! Check your intuition at the door.
Quantum Theory & Electronic Structure of Atoms It s Unreal!! Check your intuition at the door. 1 Quantum Theory of the Atom Description of the atom and subatomic particles. We will focus on the electronic
More informationChapter Test B. Chapter: Arrangement of Electrons in Atoms. possible angular momentum quantum numbers? energy level? a. 4 b. 8 c. 16 d.
Assessment Chapter Test B Chapter: Arrangement of Electrons in Atoms PART I In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question
More informationDEVELOPMENT OF THE PERIODIC TABLE
DEVELOPMENT OF THE PERIODIC TABLE Prior to the 1700s, relatively few element were known, and consisted mostly of metals used for coinage, jewelry and weapons. From early 1700s to mid-1800s, chemists discovered
More informationChapter 8. Periodic Properties of the Elements
Chapter 8 Periodic Properties of the Elements Mendeleev (1834 1907) Ordered elements by atomic mass. Saw a repeating pattern of properties. Periodic Law When the elements are arranged in order of increasing
More informationLIGHT AND THE QUANTUM MODEL
LIGHT AND THE QUANTUM MODEL WAVES Wavelength ( ) - length of one complete wave Frequency ( ) - # of waves that pass a point during a certain time period hertz (Hz) = 1/s Amplitude (A) - distance from the
More informationChapter 7. DeBroglie Waves Heisenberg s Uncertainty Quantum Numbers Electron Configuration
Chapter 7 DeBroglie Waves Heisenberg s Uncertainty Quantum Numbers Electron Configuration Are Electrons Particles or Waves? De Broglie (1892 1987) If electromagnetic radiation behaves as a particle, could
More informationThe Quantum Mechanical Model
Recall The Quantum Mechanical Model Quantum Numbers Four numbers, called quantum numbers, describe the characteristics of electrons and their orbitals Quantum Numbers Quantum Numbers The Case of Hydrogen
More informationA.P. Chemistry Practice Test - Ch. 7, Atomic Structure and Periodicity
A.P. Chemistry Practice Test - Ch. 7, Atomic Structure and Periodicity 1) Ham radio operators often broadcast on the 6-meter band. The frequency of this electromagnetic radiation is MHz. A) 50 B) 20 C)
More informationUse the Venn Diagram to compare and contrast the Bohr Model of the atom with the Quantum Mechanical Model of atom
Use the Venn Diagram to compare and contrast the Bohr Model of the atom with the Quantum Mechanical Model of atom Bohr Model Quantum Model Energy level Atomic orbital Quantum Atomic number Quantum mechanical
More information[3.3] Energy Level Diagrams and Configurations
[3.3] Energy Level Diagrams and Configurations 1 Energy Level Diagrams Energy level diagrams are used to represent the electron arrangement in an atom 2 Pauli s Exclusion Principle No two electrons have
More informationCh 9 Electrons in Atoms & the Periodic Table Study Sheet Acc. Chemistry SCANTRON. Name /99. 3) Light is a type of matter. 3)
Ch 9 Electrons in Atoms & the Periodic Table Study Sheet Acc. Chemistry SCANTRON Name /99 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) When the elements are arranged
More information