Ch4 and Ch5. Atomic History and the Atom
|
|
- Rosemary Haynes
- 5 years ago
- Views:
Transcription
1 Ch4 and Ch5 Atomic History and the Atom
2 Ch4.2 What are atoms? Atoms are the smallest part of an element that still has the element s properties.
3
4 Ch. 4.3 The Atom is Defined 400 B.C. the Greek philosopher Democritus said that the world was made of two things: Empty space and tiny particles called atoms
5 Early 1800 s John Dalton Came up with first atomic theory that is the basis for today s theory.
6 Early 1800 s John Dalton s Theory-proven 1. Every element is made of tiny, unique particles called atoms These atoms cannot be destroyed, but instead rearrange during a chemical change 2. Atoms of different elements can join to form molecules in constant whole number ratios. Law of Multiple Proportions
7 John Dalton s Theory-proven Law of Multiple Proportions
8 John Dalton s Theory-disproved Atoms cannot be broken down into smaller particles. Atoms of the same element are exactly alike in mass Why?
9 Law of conservation of matter Matter cannot be created or destroyed. It only changes its state or rearranges its atomic structure.
10 Law of Conservation of Mass
11 Conservation of Mass
12 1897 JJ Thomson Used a cathoray tube to examine if atoms were made of charged particles.
13 Opposite charges attract
14 1897 JJ Thomson Discovered atoms are made up of particles with negative charges. Called them electrons.
15 Thomson Model Electrons Positive charges, not known as protons yet
16 1913-Rutherford Put together a team of physicists to performed the gold foil experiment
17 1 out of 8000 alpha particles were repelled.
18 1913-Rutherford The experiment led to the discovery that atoms are mostly empty space. It also discovered that atoms contain a positive nucleus which contained most of the mass of the atom.
19
20 Rutherford Model
21 Nucleus positively charged (protons) makes up 99.9% of the atom s mass Also contains neutrons (James Chadwick)
22 Parts of an atom Nucleus Proton Neutron Cloud Subatomic Particles Charged Particles Electron
23
24 Protons Charge (+) Mass is equal to 1 atomic mass unit (amu) Identifies atom
25 Neutrons Net Charge (0) - neutral Mass is equal to 1amu Determine stability of nucleus
26 Electrons Charge is negative (-) Mass is equal to amu
27
28 The Periodic Table Atomic Mass
29 Ch. 4.4 Atomic Number Identifies # of protons
30 Atoms Charge All atoms have the same number of protons and electrons. They are neutral. Charges cancel each other out.
31 Mass Number Mass of a single atom # of protons # of neutrons Mass #
32 Ch 4.5 Isotopes Any atoms having the same number of protons but different number of neutrons. So they also have different mass numbers.
33 Springfield Isotopes
34 Isotopes
35
36 Average Atomic Mass Atomic mass is the mass of all isotopes of a particular element averaged together Calculated by using the mass of each isotope and the % abundance.
37 Ions Ions are charged particles. Form when atoms lose or gain electrons. Form in order to have a full outer shell Two Types.
38 Cations Positively charged ions. Form when atoms lose electrons. Form from metal atoms
39 Cations # of protons greater than # of electrons More (+) than (-)
40
41 Na Atom Na + Cation
42 Anions Negatively charged ions. Form when atoms gain electrons. Form from nonmetal atoms
43 Anions # of protons less than # of electrons More (-) than (+)
44 Cl atom Cl - Anion
45 Electromagnetic Spectrum Electromagnetic spectrum includes light at all possible energies, frequencies, and wavelengths frequency, energy Wavelength
46 Ch5.1 Modern View of Atom The study of light led to a new way of examining the atom. No longer just a particle view
47
48 <>
49 Gamma Rays highest energy and frequency. Nuclear radiation
50
51
52
53 X-Rays high ionizing energy radiation Used for imaging
54
55 Ultraviolet Light (UV) Ionizing energetic radiation Can cause skin cancer when over exposed
56
57
58 Sun Protection (SPF) 7 or less no protection 8 Extra protection but still permits tanning 15 Offers total protection from burning 30 Totally blocks UV
59 ROYGBIV Visible spectrum We see red and orange the best Blue and violet are the hottest colors, and emits the most energy, red the least and coldest White is all the colors combined, black the absence
60 Infrared Light Lower energy radiation Night vision
61
62
63
64 Microwaves Low energy radiation Used to heat food Also used in telecommunication
65
66
67 Radio Waves Have the Lowest frequencies and highest wavelengths Includes FM, AM, and TVs Radar
68 REALITY TV
69 (Ch 5.2) 1920s Niels Bohr Suggested that electrons move around atoms in set paths around the nucleus. (solar system)
70 1920s Niels Bohr He said each path is an energy level Atom s electrons can jump to different energy levels when absorbing photons (particles of light)
71 Niels Bohr States of Atoms Ground State- An electron s lowest energy state or level Excited State- An electron that is energized will jump to a higher energy state or level. Will last for a short period. (resulting light production)
72 States of Atoms? Ground State Excited state
73 This is how light is produced Ground State Excited state back to ground And Light production
74
75 Ch 5.2 Niels Bohr Bohr noticed that different atoms emitted different radiation when excited.
76 Flame Test
77 Atomic Spectra All elements emit photons carrying different amounts of energies that can be directly related to their frequencies. chemistry of SPEC-TROS-COPY Each line on spectrum is an emitted photon
78 Spectroscopy
79 Emission (Line) Spectrum Atoms and molecules are identified by these spectrums.
80
81 What the heck is light?
82 Ch5.3 Today s Theory It is impossible to determine an electron s exact position and speed at the same time. (Hiesenberg) Disproving Bohr s definite path/orbit assumption
83 Ch5.3 Today s Theory Wave-Particle Duality of atoms Electrons move around in such a way that they exhibit both wave and particle properties. Light does the same thing (photons).
84
85 Ch5.3 Today s Theory Electron positions are based on probability. (orbitals) This led to the Electron Cloud model
86 Modern Atomic Cloud Model
87
88 History Review
89 Ch. 5.3,4,5 Energy levels Electrons are found throughout different energy levels. Within these energy levels are orbitals. Each of these levels can only hold a certain amount of electrons
90 Energy levels 1 st level holds 2 e - 2 nd level holds 8 e - 3 rd level holds 8 e - or 18e- 4 th and greater level holds 8, 18, or 32 e- Outer (valence) level holds up to 8 e-
91 Valence Electron The number of electrons in the outermost electron shell. Most important
92 Making Bohr Models
93 Bohr s Model Blue dots represent electrons Rings represent energy Level, NOT orbit (path)
Honors Ch3 and Ch4. Atomic History and the Atom
Honors Ch3 and Ch4 Atomic History and the Atom Ch. 3.1 The Atom is Defined 400 B.C. the Greek philosopher Democritus said that the world was made of two things: Empty space and tiny particles called atoms
More informationDemocritus & Leucippus (~400 BC) Greek philosophers: first to propose that matter is made up of particles called atomos, the Greek word for atoms
Chemistry Ms. Ye Name Date Block The Evolution of the Atomic Model Since atoms are too small to see even with a very powerful microscope, scientists rely upon indirect evidence and models to help them
More informationWhat is a theory? An organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
Atomic Structure What is a theory? An organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena Early Theories Democritus: 4 B.C.: atom He
More informationRegents Chemistry Unit 1 Atomic Concepts. Textbook Chapters 3 & 4
Regents Chemistry Unit 1 Atomic Concepts Textbook Chapters 3 & 4 Atomic Theory- Atoms are the building blocks of matter Atomic Models Democritus ~440 BC a Greek Philosopher suggested that matter is made
More informationAtomic Structure Chapter 4
Atomic Structure Chapter 4 Outline A History of the Atomic Model Electron Structure of the Atom Useful Element Notations Early Thoughts on the Structure of Matter Before the invention of high powered microscopes,
More informationNotes:&&Unit&4:&Atomics& & & & & & & & & & & & & & & & &
Name: RegentsChemistry:Mr.Palermo Notes:Unit4:Atomics! www.mrpalermo.com Name: $ Key$Ideas$ Themodernmodeloftheatomhasevolvedoveralongperiodoftimethroughtheworkofmany scientists.(3.1a) Eachatomhasanucleus,withanoverallpositivecharge,surroundedbyoneormorenegatively
More informationAtomic Structure Early Theories Democritus: 4 B.C.: atom Dalton: atoms cannot Thomson: Cathode Ray Tubes Rutherford:
Atomic Structure n a well-substantiated explanation of some aspect of the natural world; n an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set
More informationChap 4 Bell -Ringers
Chap 4 Bell -Ringers The Structure of the Atom The Atom has a Structure What we ve seen so far Chapter 1 The Science of Chemistry - Chemistry is about discovering and understanding natural laws using the
More informationChapter #1 - Atomic Structure
Chapter #1 - Atomic Structure Atomic Theories Democritus (460-340 BC) Democritus believed that all matter consisted of extremely small particles that could not be divided. He called them atoms from the
More informationUnit 3. The Atom & Modern Atomic Theory
Unit 3 The Atom & Modern Atomic Theory Theories of the Atom Early Models & Thoughts: Democritus Matter is made up of tiny particles called atoms. Smallest unit that retains the identity of the element
More informationDemocritus & Leucippus (~400 BC) Greek philosophers: first to propose that matter is made up of particles called atomos, the Greek word for atoms
AP Chemistry Ms. Ye Name Date Block The Evolution of the Atomic Model Since atoms are too small to see even with a very powerful microscope, scientists rely upon indirect evidence and models to help them
More informationUnit 1, Lesson 01: Summary of Atomic Structure so far
Unit 1, Lesson 01: Summary of Atomic Structure so far Atoms are made of sub-atomic particles: Protons: found in the nucleus, charge of 1+, mass of 1 amu (u) Neutrons: found in nucleus, no charge, mass
More informationThe History of the Atom. How did we learn about the atom?
The History of the Atom How did we learn about the atom? The Atomic Theory of Matter All matter is made up of fundamental particles. What does fundamental mean? The Greek Philosophers, 400 B.C. Democritus
More informationDevelopment of Atomic Theory Elements of chemistry- Atoms, the building blocks of matter Video
Development of Atomic Theory Elements of chemistry- Atoms, the building blocks of matter Video 2 CH 4- Atoms 1 Discovering the Atom In this lesson we will take a look at the scientists who explored the
More informationAtomic Theory. Developing the Nuclear Model of the Atom. Saturday, January 20, 18
Atomic Theory Developing the Nuclear Model of the Atom Democritus Theory: Atom, the indivisible particle c. 300 BC Democritus Problem: No scientific evidence c. 300 BC Dalton Theory: The solid sphere model
More information4-1 Notes. Defining the Atom
4-1 Notes Defining the Atom Early Models of the Atom All matter is composed of atoms Atoms are the smallest particles of an element that retains their identity in a chemical reaction Greek philosopher
More informationAtomic Theory. Democritus to the Planetary Model
Atomic Theory Democritus to the Planetary Model Democritus Greek philosopher (460-370 BCE) Believed in the philosophy of materialism With Leucippus, they though that matter can not be divided infinitely.
More informationHISTORY OF THE ATOM ATOMA
S.MORRIS 2006 HISTORY OF THE ATOM 460 BC Democritus develops the idea of atoms he pounded up materials in his pestle and mortar until he had reduced them to smaller and smaller particles which he called
More informationThe Development of Atomic Theory
The Development of Atomic Theory Democritus (400 BC) John Dalton (1803) J.J. Thomson (1897) Ernest Rutherford (1911) James Chadwick (1932) - suggested that matter is composed of indivisible particles called
More information4/14/2013 ATOMIC STRUCTURE THE ATOMIC MODEL
ATOMIC STRUCTURE R E G E N T S C H E M I S T R Y M R S. T I L A R O HISTORY OF THE ATOM O L D A N D M O D E R N A T O M THE ATOMIC MODEL Model of the atom is based on indirect experimental data. Model
More informationNuclear Chemistry. Atomic Structure Notes Start on Slide 20 from the second class lecture
Nuclear Chemistry Atomic Structure Notes Start on Slide 20 from the second class lecture The Birth of an Idea Democritus, 400 B.C. coined the term atom If you divide matter into smaller and smaller pieces,
More informationAtomic Structure. Chemistry Mr. McKenzie
Atomic Structure Chemistry Mr. McKenzie How was the understanding of the atom developed? John Dalton (1766-1844) - developed a model to explain observations made at the time 1. Elements are made of tiny
More informationATOM. Rich -Paradis. Early Thoughts Aristotle-- Continuous theory. Matter can be divided indefinitely. Greeks
ATOM Early Thoughts Aristotle-- Continuous theory Greeks Matter can be divided indefinitely matter is made up of particles--4 elements 4 elements --air--fire--water- -- earth Democritus --Discontinuous
More informationa. According to Dalton, what is inside the atom? Nothing, the atom it the smallest
Unit 3: Review SCIENTIFIC THEORIES Dalton theorized that atoms were the smallest particle and could not be divided. Atoms can bond with one another in whole number ratios to form compounds but cannot be
More informationChapter 9: Electrons and the Periodic Table
C h e m i s t r y 1 2 C h 9 : E l e c t r o n s a n d P e r i o d i c T a b l e P a g e 1 Chapter 9: Electrons and the Periodic Table Work on MasteringChemistry assignments What we have learned: Dalton
More information8.5 Atomic Structure
Views of the Atom Democritus (Greek philosopher from 460 BC to 370 BC) Believed that atoms were indivisible and indestructible. His approach was simply philosophy and was not based upon the scientific
More informationCHEMISTRY 11 UNIT REVIEW: ATOMIC THEORY & PERIODIC TRENDS
CHEMISTRY 11 UNIT REVIEW: ATOMIC THEORY & PERIODIC TRENDS Atoms Atoms have protons and neutrons located in the nucleus of the atom. Electrons orbit around the nucleus in well-defined paths. Protons have
More information2 Atomic Theory Development of Theory
Atomic Theory Development of Theory Historical Atomic Models Democritus Greek philosopher who postulated that matter is comprised of atoms as the smallest part (ca 400 BC) John Dalton Max Planck J.J. Thompson
More informationWhere are we? Check-In
Where are we? Check-In ü Building Blocks of Matter ü Moles, molecules, grams, gases, ü The Bohr Model solutions, and percent composition Coulomb s Law ü Empirical and Molecular formulas Photoelectron Spectroscopy
More informationWhat is matter? Matter is anything that has mass and takes up space. Matter is made up of atoms.
Matter What is matter? Matter is anything that has mass and takes up space. Matter is made up of atoms. Is it matter? Can you measure the object? Does it take up space? Does the object have a mass? Come
More informationWhat is the current atomic model?
4.1 Atoms Basic Units of Matter What is the current atomic model? Matter is anything that has mass and takes up space, such as gases, solids, and liquids. Matter is not sound, heat, or light these are
More informationCollegiate Institute for Math and Science Day 57: December 9, 2016 Room 427
Unit 2: Atomic Concepts Outline Name: Period: Date: 1. The modern model of the atom has evolved over a long period of time through the work of many scientists. Dalton s Model: Elements are made of atoms
More informationAtoms and Their Structures
Chapter Menu Section 2.1 Section 2.2 Atoms and Their Structures Electrons in Atoms Click a hyperlink to view the corresponding slides. Atoms and Their Structures Relate historic experiments to the development
More informationCHAPTER 4: Matter is Made up of Atoms
CHAPTER 4: Matter is Made up of Atoms ATOMS & THEIR STRUCTURE Aristotle thought matter was made of air, earth, fire and water. Democritus (250 B.C.)- Said the world is made of empty space & tiny particles
More informationChapter 4 Lesson 2 Notes
Chapter 4 Lesson 2 Notes How were electrons discovered? Scientists have put together a detailed model of atoms and their parts. Here is the journey of atom parts. How were electrons discovered? (cont.)
More informationAtomic Models. A model uses familiar ideas to explain unfamiliar facts observed in nature. A model can be changed as new information is collected.
This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in different energy levels. Atomic Models A model uses familiar ideas
More informationUNIT 2 - ATOMIC THEORY
*KEY* *KEY* UNIT 2 - ATOMIC THEORY *KEY* *KEY* VOCABULARY: Allotrope Anion Atom Atomic Mass Atomic Mass unit (a.m.u.) Atomic number Bohr model Cation Compound Electron Electron Configuration Element Excited
More informationCHEMISTRY 11 UNIT REVIEW: ATOMIC THEORY & PERIODIC TRENDS
CHEMISTRY 11 UNIT REVIEW: ATOMIC THEORY & PERIODIC TRENDS Atoms Atoms have protons and neutrons located in the nucleus of the atom. Electrons orbit around the nucleus in well-defined paths. Protons have
More informationUNDERLYING STRUCTURE OF MATTER
1 UNDERLYING STRUCTURE OF MATTER Chapter 4 Atomic Structure DEFINING THE ATOM Earlier theories of matter: A. Even though his hypothesis lacked evidence at the time, the Greek philosopher Democritus (460
More informationChapter 2 Atoms and Elements. 2.4 The Atom
Chapter 2 Atoms and Elements 2.4 The Atom Atoms Dalton s Atomic Theory Are tiny particles of matter. Of an element are similar and different from other elements. Of two or more different elements combine
More informationIntroduction to Atoms. Key terms are: nucleus, proton, neutron, electron, atomic number, isotope, mass number, model.
Introduction to Atoms Key terms are: nucleus, proton, neutron, electron, atomic number, isotope, mass number, model. The Structure of an Atom---is the atoms the smallest part of matter? Atoms are made
More informationI. History and Development of the Atom
Unit 3: The Atom I. History and Development of the Atom A. Democritus (around 400 B.C.) Based on his observations of the natural world around him, Democritus was the first to suggest that all matter was
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 informationHot Sync. Materials Needed Today
Chapter 4 Lesson 2 Materials Needed Today Please take these materials out of your backpack. Pencil Blank sheet of paper for notes. Hot Sync Friday 1/10/14 Answer the following questions in complete sentences
More informationAtomic Structure. For thousands of years, people had many ideas about matter Ancient Greeks believed that everything was made up of the four elements
An atom is the smallest particle of an element that retains its identity in a chemical reaction. Although early philosophers and scientists could not observe individual atoms, they were still able to propose
More informationUNIT TWO TEST HISTORY OF ATOM, STRUCTURE OF ATOM, ATOMIC MASS CARBON-12
KEY Review Sheet: UNIT TWO TEST HISTORY OF ATOM, STRUCTURE OF ATOM, ATOMIC MASS 1. Know which isotope is the standard for the atomic mass unit. CARBON-12 2. Know what the difference in masses of isotopes
More informationPROGRESSION OF THE ATOMIC MODEL
PROGRESSION OF THE ATOMIC MODEL By 1808, it was widely accepted that matter was made up of ELEMENTS, which consisted of tiny PARTICLES called ATOMS. After 2000 years - DEMOCRITUS was right all along John
More informationThe structure of Atom III
The structure of Atom III Atomic Structure If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations of creatures, what statement
More informationChapter 3: Atomic Theory
Chapter 3: Atomic Theory and Elements, Atoms, Compounds & Ions A. The Elements All of the materials in the universe can be chemically broken down into about 100 different elements. 1. Element can have
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 informationH CHEM - WED, 9/7/16. Do Now Be ready for notes. Sigfig review problem. Agenda Atomic Theory. Homework. Error Analysis
H CHEM - WED, 9/7/16 Do Now Be ready for notes. Sigfig review problem Agenda Atomic Theory Error Analysis Homework Possibly atomic theory paragraph THE ATOM DEFINITION TO START Atom smallest particle
More informationDo Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester?
Chemistry Ms. Ye Name Date Block Do Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester? Atoms Video: 1. Proper Portioned Giant Atom Model of Science: Structure
More informationThe Structure of the Atom
The Structure of the Atom 1 The Atom as Matter Dalton s atomic theory had problems It considered atoms to be hard, indivisible particles Did not explain why atoms reacted Also did not explain why atoms
More informationAlchemy Unit Investigation III. Lesson 7: Life on the Edge
Alchemy Unit Investigation III Lesson 7: Life on the Edge The Big Question How does the atomic structure of atoms account for the trends in periodicity of the elements? You will be able to: Explain how
More informationNOTES ON CHAPTER 4: ELEMENTS AND THE PERIODIC TABLE. 4.1 Introduction to Atoms
NOTES ON CHAPTER 4: ELEMENTS AND THE PERIODIC TABLE 4.1 Introduction to Atoms The first people to think about the nature of matter were the ancient Greeks. Around 430 B.C, Democritus, a Greek philosopher,
More informationEarly Models of the Atom
Early Models of the Atom An atom is the smallest particle of an element that retains its identity in a chemical reaction. Although early philosophers and scientists could not observe individual atoms,
More informationUnit 2: Atomic Structure Practice Packet
Unit 2: Atomic Structure Practice Packet Dalton s Model: hard sphere model 1. I can describe John Dalton s contribution to our Thomson s Experiment: cathode ray experiment 2. I can describe JJ Thomson
More informationDemocritus s ideas don t explain chemical behavior & lacked experimental support.
A1: Atomic Structure Worksheet Key (Goals 1 3, Chapter 4) 1. Democritus, who lived in Greece during the 4 th century B.C., suggested that matter is made up of tiny particles that cannot be divided. He
More informationSCH4C Practice WS Unit 1
Name: Class: Date: SCH4C Practice WS Unit 1 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The special band of light waves that the human eye can detect
More informationChapter 4 Jeopardy Review
Chapter 4 Jeopardy Review Atom Models of the Atom Atomic Theory Calculating Subatomic Particles Isotopes 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500
More informationLight Study of light by Newton helped lead to the quantum mechanical model. INTRO AND BACKGROUND: Atomic Structure. Electromagne?
INTRO AND BACKGROUND: Atomic Structure Light Study of light by Newton helped lead to the quantum mechanical model All light exhibits WAVE properties -AMPLITUDE: height of a wave -WAVELENGTH: distance between
More informationtomic tructure Chapter 3
tomic tructure Chapter 3 Early Theories of Matter 460 BC Democritus Proposed the matter was not infinitely divisible. Believed matter composed of particles called atoms. Early Theories of Matter Aristotle
More informationUNIT 2 - ATOMIC THEORY
UNIT 2 - ATOMIC THEORY VOCABULARY: Allotrope Electron Configuration Nuclear Charge Anion Element Nucleons Atom Excited state Nucleus Atomic Mass Ground state Orbital Atomic Mass unit (a.m.u.) Ion Proton
More informationUNIT 2 - ATOMIC THEORY
UNIT 2 - ATOMIC THEORY VOCABULARY: Allotrope Electron Configuration Nuclear Charge Anion Element Nucleons Atom Excited state Nucleus Atomic Mass Ground state Orbital Atomic Mass unit (a.m.u.) Ion Proton
More informationChapter 3. Atom. Table of Contents. 1. Atom and History of Atom 2. Subatomic Particles 3. Isotopes 4. Ions 5. Atomic Terminology
Atom Table of Contents 1. Atom and History of Atom 2. Subatomic Particles 3. Isotopes 4. Ions 5. Atomic Terminology The History of The Atom Warm up Make a list of inferences about any properties of objects
More informationUnit 3: The Atom Part 1. DUE: Friday October 13, 2017
Unit 3: The Atom Part 1 The following pages are practice questions for this unit, and will be submitted for homework! You must complete: What is in an atom? ALL QUESTIONS Calculating the Number of Protons,
More informationAtomic Structure ATOMIC STRUCTURE. All matter is composed of atoms.
All matter is composed of atoms. ATOMIC STRUCTURE Understanding the structure of atoms is critical to understanding the properties of matter HISTORY OF THE ATOM DALTONS ATOMIC THEORY 1808 John Dalton suggested
More informationTEST REVIEW GCAA Chemistry Atoms. A. Excited B. Energy C. Orbital D. Plum Pudding Model
TEST REVIEW GCAA Chemistry Atoms From the Hangman Game-----Match the answers correctly! A. Excited B. Energy C. Orbital D. Plum Pudding Model E. Bohr F. Electron G. Frequency H. Neutron I. Thomson J. alpha
More informationDalton Thompson Rutherford Bohr Modern Model ("Wave. Models of the Atom
Dalton Thompson Rutherford Bohr Modern Model ("Wave Models of the Atom Mechanical" Model) Aim: To discuss the scientists and their contributions to the current atomic model. Focus: Rutherford's Gold Foil
More informationChapter 7: The Quantum-Mechanical Model of the Atom
C h e m i s t r y 1 A : C h a p t e r 7 P a g e 1 Chapter 7: The Quantum-Mechanical Model of the Atom Homework: Read Chapter 7. Work out sample/practice exercises Check for the MasteringChemistry.com assignment
More informationBOHR CHADWICK S ATOMIC NUMBER
CH 11 T3 ATOMIC THEORY PART 2 1 You have mastered this topic when you can: 1) name and describe the atomic models developed by RUTHERFORD and BOHR. 2) describe CHADWICK S contribution to the structure
More informationEarly Ideas About Matter
Early Ideas About Matter Democritus (460 370 BC) believed that matter is made of small, solid objects called atomos, from which the English word atom is derived. Early Ideas About Matter (cont.) Aristotle
More informationDemocritus thought atoms were indivisible & indestructible Lacked experimental support 4 th century B.C.
Chapter 5 Democritus thought atoms were indivisible & indestructible Lacked experimental support 4 th century B.C. Democritus thought atoms were indivisible & indestructible Lacked experimental support
More informationEx: N has 5 valence electrons, so it s Lewis structure would look like: N
Chemistry Ms. Ye Review: Bohr Model of the Atom Name Date Block Electrons are shown in concentric shells or energy levels around the nucleus o The first shell can hold up to o The second shell can hold
More informationATOMIC STRUCTURE AND THE PERIODIC TABLE. Adapted from Addison Wesley Chemistry
ATOMIC STRUCTURE AND THE PERIODIC TABLE Adapted from Addison Wesley Chemistry HISTORY OF THE ATOM 4 th Century B.C. : Democritus suggested that matter was made up of very small particles called atoms.
More informationAtomic Structure. History of Atomic Theory
Atomic Structure History of Atomic Theory Democritus (460-370 BC) Was the to come up with the idea of atom Believed that all matter was composed of Which is derived from the Greek word Atomos meaning He
More informationAtoms, Elements, and the Periodic Table
chapter 00 3 3 Atoms, Elements, and the Periodic Table section 1 Structure of Matter Before You Read Take a deep breath. What fills your lungs? Can you see it or hold it in your hand? What You ll Learn
More informationDo Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester?
Chemistry Ms. Ye Name Date Block Do Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester? Atoms Video: 1. Proper Portioned Giant Atom Model of Science: Structure
More informationChem 1075 Chapter 5 Models of the Atom Lecture Outline
Chem 1075 Chapter 5 Models of the Atom Lecture Outline Slide 2 Dalton Model of the Atom John Dalton proposed that is made up of The particles are or can be broken down into by chemical processes. cannot
More informationThe idea of an atom began about 400 B.C. with many Greek philosophers, like Democritus, working to figure out what everything was made of.
The idea of an atom began about 400 B.C. with many Greek philosophers, like Democritus, working to figure out what everything was made of. Always move & join together Atomas means indivisible I m Aristotle
More informationEARLY VIEWS: The Ancient Greeks
Feb 7 11:59 AM EARLY VIEWS: The Ancient Greeks Empedocles (c. 450 B.C.) proposed Four Element theory he thought that matter was composed of four elements: AIR, EARTH, FIRE and WATER elements mixed together
More informationUnit 3 Lesson 1 The Atom. Copyright Houghton Mifflin Harcourt Publishing Company
As a Matter of Fact What makes up matter? The Greek philosopher Democritus thought matter could be divided into smaller units until you obtained a particle that could not be cut. He called this particle
More informationprotons electrons neutrons nucleus Center of the atom; contains protons and neutrons. The Atom Molecules are made up of two or more atoms.
_ Period: The Atom Ch. 18:1 Everything is made of atoms. Atoms are the smallest part of matter. Atoms are made up of 3 subatomic particles (particles smaller than the atom): electrons, protons, and neutrons.
More informationHistory of Atomic Theory
Unit 2 The Atom History of Atomic Theory A. Democritus and Aristotle Democritus named the "atom" - means indivisible Dalton (with work of Lavoisier, Proust, and Gay-Lussac) 1. atomic theory - first based
More informationCHAPTER 3. Chemical Foundations
CHAPTER 3 Chemical Foundations 3.1 THE ELEMENTS 118 elements in 92 occur naturally, the rest are synthesized All matter in the universe can be chemically broken down into elements Compounds are made by
More informationChapter 4 The Atom. Philosophers and scientists have proposed many ideas on the structure of atoms.
Chapter4 TheAtom 4.1 Early Models of the Atom An atom is the smallest particle of an element that retains its identity in a chemical reaction. Philosophers and scientists have proposed many ideas on the
More informationEarly Ideas about Matter
Early Ideas about Matter atom The smallest piece of the element with all the chemical properties of the element an old and new idea Greeks Discontinuists Democritus Continuists Aristotle Discontinuists
More information10. What word is used to describe properties of a substance that depend on the quantity of substance? Give two examples of such properties.
1. In which state does matter have a definite shape and volume? 2. In which state of matter are forces between particles least dominant? 3. What kind of change does not alter the composition or identity
More informationAtomic Structure. How do you discover and study something you can t see?
Atomic Structure How do you discover and study something you can t see? WHAT IS A THEORY? A hypothesis is a proposed explanation made as a starting point for further investigation (It s bright outside
More informationHONORS CHEMISTRY. Chapter 4 Atomic Structure
HONORS CHEMISTRY Chapter 4 Atomic Structure History of the Atomic Theory DEMOCRITUS (400 BC) 1st atomic theory World is made of empty space & tiny particles called atoms. Atomos - Greek for indivisible
More informationEarly Atomic Models. Atoms: the smallest particle of an element that retains the properties of that element.
Chapter 5 Early Atomic Models Atoms: the smallest particle of an element that retains the properties of that element. (Greek: atomos = indivisible) Democritus (Greek teacher in the 4 th century BC) First
More information1. The most important aspects of the quantum theory.
Lecture 5. Radiation and energy. Objectives: 1. The most important aspects of the quantum theory: atom, subatomic particles, atomic number, mass number, atomic mass, isotopes, simplified atomic diagrams,
More informationWarm-up For sulfur: 1. How many valence electrons does it have? 2. What ion does this typically form? 3. Write the electron configuration for the ion.
Warm-up For sulfur: 1. How many valence electrons does it have? 2. What ion does this typically form? 3. Write the electron configuration for the ion. Nucleus Contains 99.9% of the mass of an atom Found
More informationChemistry. Chapter 14 Section 1
Chemistry Chapter 14 Section 1 What is matter? Matter is anything that has mass and takes up space What is matter made of?? Atoms. All matter is made of atoms. Atoms are the building blocks of Matter There
More informationIn many ways, Dalton's ideas are still useful today. For example, they help us to understand elements, compounds, and molecules.
History of the Atom Name: Reading excerpt from Absorb Chemistry for GCSE by Lawrie Ryan http://www.absorblearning.com/chemistry/demo/units/lr301.html Introduction Our understanding of the physical world
More informationAtomic Structure Discovered. Dalton s Atomic Theory. Discovery of the Electron 10/30/2012
Atomic Structure Discovered Ancient Greeks Democritus (460-362 BC) - indivisible particles called atoms Prevailing argument (Plato and Aristotle) - matter is continuously and infinitely divisible John
More informationChapter Review- Josh and Niels
Chapter Review- Josh and Niels 1. Rutherford s Atom Rutherford s experiment Shot alpha particles at gold foil and they bounced in different directions Shows that there we different things in the atom Didn
More informationAtomic Structure. A model uses familiar ideas to explain unfamiliar facts observed in nature.
Atomic Structure 1 2 This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in different energy levels. A model uses familiar
More informationName: Date: Blk: Dalton Thomson Rutherford Bohr THOMSON
Name: Date: Blk: NOTES: ATOMIC STRUCTURE I. History of the Atom Dalton Thomson Rutherford Bohr 1803 1897 1909 1913 1. DALTON - everything is made of atoms - different elements combine to form compounds
More informationCHAPTER 4. Atomic Structure. 4.1 Atoms. Dalton s Atomic Theory
CHAPTER 4 Atomic Structure 4.1 Atoms Democritus first suggested the idea of atoms Indivisible & Indestructible 460 B.C. 370 B.C. Dalton s Atomic Theory 1. All elements are composed of submicroscopic indivisible
More information