Unit 3: The Atom Part 1. DUE: Friday October 13, 2017
|
|
- Meghan Snow
- 6 years ago
- Views:
Transcription
1 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, Neutrons, and Electrons ALL QUESTIONS Calculating Average Atomic Mass o Questions 1-3 ALL QUESTIONS o Questions OPTIONAL History of Atomic Structure ALL QUESTIONS Practice Regents Questions ALL QUESTIONS DUE: Friday October 13,
2 What is in an Atom? Directions: Use your knowledge of chemistry to fill in the table below. Subatomic Particle Location Charge Relative Mass Neutron Proton Electron Directions: Label the parts of an atom. Write your answer on the arrow Calculating the Number of Protons, Neutrons, and Electrons Directions: Using your reference table and your knowledge of chemistry, fill in the following chart. Element Symbol Name Silver Atomic Number Atomic Mass Mass Number # of Protons # of Electrons # of Neutrons C Zn 5 25 Kr
3 Calculating Average Atomic Mass Directions: Using your reference table and your knowledge of chemistry, calculate the average atomic mass. 1. Chlorine has 2 naturally occurring isotopes. Using the information provided below, calculate the average atomic mass for chlorine. SHOW ALL WORK Isotope Natural Abundance on Earth (%) Atomic Mass (amu) 35 Cl Cl Titanium has 5 naturally occurring isotopes. Using the information provided below, calculate the average atomic mass for titanium. SHOW ALL WORK. Isotope Natural Abundance on Earth (%) Atomic Mass (amu) Ti Ti Ti Ti Ti Natural samples of copper contain two isotopes. 63 Cu has a mass of amu and 65 Cu has a mass of amu. The percent abundance of 63 Cu is 69.09%. Calculate the average atomic mass of copper. 3
4 4. OPTIONAL: Calculate the atomic mass of an element if 60.4% of the atoms have a mass of amu and the rest have a mass of amu. Identify the element in the periodic table. 5. OPTIONAL: Europium has two stable isotopes: 151 Eu with a mass of amu and 153 Eu with a mass of If elemental Europium is found to have a mass of amu on earth, calculate the percent of each of the two isotopes. 4
5 History of Atomic Structure John Dalton ( ): John Dalton was an English chemist. His ideas form the atomic theory of matter. Here are his ideas. All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. All atoms of the same elements are alike. (One atom of oxygen is like another atom of oxygen.) Atoms of different elements are different. (An atom of oxygen is different from an atom of hydrogen.) Atoms of different elements combine to form a compound. These atoms have to be in definite whole number ratios. For example, water is a compound made up of 2 atoms of hydrogen and 1 atom of oxygen (a ratio of 2:1). Three atoms of hydrogen and 2 atoms of oxygen cannot combine to make water. 1. What is the name of John Dalton s theory? 2. What are elements made of? 3. An atom of hydrogen and an atom of carbon are 4. What are compounds made of? 5. The ratio of atoms in HCl is: a) 1:3 b) 2:1 c) 1:1 J. J. Thompson (Late 1800s): J. J. Thompson was an English scientist. He discovered the electron when he was experimenting with gas discharge tubes. He noticed a movement in a tube. He called the movement cathode rays. The rays moved from the negative end of the tube to the positive end. He realized that the rays were made of negatively charged particles electrons. 1. What did J.J. Thompson discover? 2. What is the charge of an electron? 3. What are cathode rays made of? 4. Why do electrons move from the negative end of the tube to the positive end? 5. What was Thompson working with when he discovered the cathode rays? 5
6 Lord Ernest Rutherford ( ): Ernest Rutherford conducted a famous experiment called the gold foil experiment. He used a thin sheet of gold foil. He also used special equipment to shoot alpha particles (positively charged particles) at the gold foil. Most particles passed straight through the foil like the foil was not there. Some particles went straight back or were deflected (went in another direction) as if they had hit something. The experiment shows: Atoms are made of a small positive nucleus; positive nucleus repels (pushes away) positive alpha particles Atoms are mostly empty space 1. What is the charge of an alpha particle? 2. Why is Rutherford s experiment called the gold foil experiment? 3. How did he know that an atom was mostly empty space? 4. What happened to the alpha particles as they hit the gold foil? 5. How did he know that the nucleus was positively charged? Niels Bohr (Early 1900s): Niels Bohr was a Danish physicist. He proposed a model of the atom that is similar to the model of the solar system. The electrons go around the nucleus like planets orbit around the sun. All electrons have their energy levels a certain distance from the nucleus. Each energy level can hold a certain number of electrons. Level 1 can hold 2 electrons, Level 2-8 electrons, Level 3-18 electrons, and level 4 32 electrons. The energy of electrons goes up from level 1 to other levels. When electrons release (lose) energy they go down a level. When electrons absorb (gain) energy, they go to a higher level. 1. Why could Bohr s model be called a planetary model of the atom? 2. How do electrons in the same atom differ? 3. How many electrons can the fourth energy level hold? 4. Would an electron have to absorb or release energy to jump from the second energy level to the third energy level? 5. For an electron to fall from the third energy level to the second energy level, it must energy. 6
7 Practice Regents Questions 1. The table below gives the masses of two different subatomic particles found in an atom. Subatomic Particle and Their Masses Subatomic Particle Mass (g) X 1.67 x Z 9.11 x Which of the subatomic particles are each paired with their corresponding name? a. X, proton and Z, electron c. X, neutron and Z, proton b. X, proton and Z, neutron d. X, electron and Z, proton 2. What is the number of electrons in an atom that has 3 protons and 4 neutrons? a. 1 c. 3 b. 7 d In the late 1800s, experiments using cathode ray tubes led to the discovery of the a. Electron c. Positron b. Neutron d. Proton 4. Which subatomic particles are located in the nucleus of an He-4 atom? a. Electrons and neutrons b. Electrons and protons c. Neutrons and protons d. Neutrons, protons, and electrons 5. What was concluded about the structure of the atom as the result of the gold foil experiment? a. A positively charged nucleus is surrounded by positively charged particles b. A positively charged nucleus is surrounded by mostly empty space c. A negatively charged nucleus is surrounded by positively charged particles d. A negatively charged nucleus is surrounded by mostly empty space 6. Which sequence represents a correct order of historical developments leading to the modern model of the atom? a. The atom is a hard sphere à most of the atom is empty space à electrons exist in orbitals outside the nucleus b. The atom is a hard sphere à electrons exist in orbitals outside the nucleus à most of the atom is empty space c. Most of the atom is empty space à electrons exist in orbitals outside the nucleus à the atom is a hard sphere d. Most of the atom is empty space à the atom is a hard sphere à electrons exist in orbitals outside the nucleus 7. All phosphorous atoms have the same a. Atomic number b. Mass number c. Number of neutrons plus the number of electrons d. Number of neutrons plus the number of protons 7
8 8. Two atoms will always have the same atomic number if they have the same a. Mass number c. Number of neutrons b. Number of protons d. Number of nucleons 9. The atomic mass of an element is the weighted average of the atomic masses of a. The least abundant isotopes of the element b. The naturally occurring isotopes of the element c. The artificially produced isotopes of the element d. The natural and artificial isotopes of the element 10. Which quantity can vary amount atoms of the same element? a. Mass number c. Number of protons b. Atomic number d. Number of electrons 11. What is the mass number of an atom that has six protons, six electrons, and eight neutrons? a. 6 c. 14 b. 12 d An atom that has 13 protons and 15 neutrons is an isotope of the element a. Nickle c. Aluminum b. Silicon d. Phosphorus 13. The total number of protons, electrons, and neutrons in each of four different atoms are shown in the table below Subatomic Particles in Four Different Atoms Atom Total Number of Protons Total Number of Electrons Total Number of Neutrons A D X Z Which two atoms are isotopes of the same element? a. A and D b. A and Z c. X and D d. X and Z 14. Which notations represent different isotopes of the element sodium? a. 32 S and 34 S c. Na + and Na 0 b. S 2- and S 6+ d. 22 Na and 23 Na 15. Which diagram represents the nucleus of an atom of 27 13Al a. 14 n 27 p b. 14 n 13 p c. 27 n 13 p d. 40 n 13 p 8
CHEMISTRY 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 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 informationName: Per: Date: Teacher: Official Class: Chemistry. Unit 1: The Atom
Unit 1: The Atom The following pages are practice questions for this unit, and will be submitted for homework! You must complete: Unit Vocabulary ALL QUESTIONS What is an Atom? ALL QUESTIONS Calculating
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 informationTeacher: Mr. gerraputa. Name: Base your answer to the question on the information below. Given the electron dot diagram:
Teacher: Mr. gerraputa Print Close Name: 1. Given the electron dot diagram: The valence electrons represented by the electron dot diagram could be those of atoms in Group 1. 13 3. 3 2. 15 4. 16 2. Which
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 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 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 information7.1 Development of a Modern Atomic Theory
7.1 Development of a Modern Atomic Theory Development of the Atomic Theory Many scientists in different countries have contributed to the understanding of matter - atoms John Dalton Credited with developing
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 information4. The mass of a proton is approximately equal to the mass of A an alpha particle C a positron. B a beta particle D a neutron
1. Which particles have approximately the same mass? A an electron and an alpha particle B an electron and a proton C a neutron and an alpha particle D a neutron and a proton 2. Which phrase describes
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 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 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 informationChapter 2 Atoms and Elements
1 Chapter 2 Atoms and Elements Sec 2.3 Modern Atomic Theory and the Laws That Led to it Law of conservation of mass states that in a chemical reaction, matter is neither created nor destroyed. Law of definite
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 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 informationPractice Packet Level 3: Atomics
Name: Regents Chemistry: Mr. Palermo Practice Packet Level 3: Atomics Name: Unit Vocabulary: For each word, provide a short but specific definition from YOUR OWN BRAIN! No boring textbook definitions.
More informationAtomic Class Packet Unit 3
The modern model of the atom has evolved over a long period of time through the work of many scientists.(3.1a) Each atom has a nucleus, with an overall positive charge, surrounded by one or more negatively
More informationParticle Theory of Matter. By the late 1700s, scientists had adopted the Particle Theory of Matter. This theory states that:
Particle Theory of Matter By the late 1700s, scientists had adopted the Particle Theory of Matter. This theory states that: all matter is made up of very tiny particles each pure substance has its own
More informationName Date Class DEFINING THE ATOM
4.1 DEFINING THE ATOM Section Review Objectives Describe Democritus s ideas about atoms Explain Dalton s atomic theory Describe the size of an atom Vocabulary atom Dalton s atomic theory Part A Completion
More informationGet out your diagram from your research paper. Get out a sheet of paper to take some notes on.
Bellwork: Get out your diagram from your research paper. Get out a sheet of paper to take some notes on. Fill in the Following Table in your notes (assume an atom unless otherwise stated: Symbol Protons
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 information2015 Name: Test 1 Atomic Structure
2015 Name: Test 1 Atomic Structure 1. During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms A) return to lower energy
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 informationPractice Packet Unit 4: Atomic Structure
Name: Regents Chemistry Practice Packet Unit 4: Atomic Structure Assess Yourself: Vocab: Lesson 1: Lesson 2: Lesson 3: Lesson 4: Lesson 5: Lesson 6: Lesson 7: 1 Vocabulary: Check your understanding. Describe
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 informationAtom Practice Test (#1) 1) What is the total number of valence electrons in an atom with the electron configuration 2-8-5? a) 2 b) 5 c) 8 d) 15
Atom Practice Test (#1) Name Multiple Choice 1 pt. each 1) What is the total number of valence electrons in an atom with the electron configuration 2-8-5? a) 2 b) 5 c) 8 d) 15 2) A Ca 2+ ion differs from
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 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 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 informationThe Atom. protons, neutrons, and electrons oh my!
The Atom protons, neutrons, and electrons oh my! What s an Atom? An atom is the smallest physical particle of an element that still retains the properties of that element. How Big is an Atom? At sea level,
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 informationCH4 HOMEWORK : ATOMIC STRUCTURE
Name Date Class 4 CH4 HOMEWORK : ATOMIC STRUCTURE SECTION 4.1 DEFINING THE ATOM (pages 101 103) This section describes early atomic theories of matter and provides ways to understand the tiny size of individual
More informationCHAPTER -4 STRUCTURE OF ATOM CONCEPT DETAILS
CHAPTER -4 STRUCTURE OF ATOM CONCEPT DETAILS KEY CONCEPTS : [ *rating as per the significance of concept] 1. Dalton s Atomic theory ** 2. J J Thomson Experiments *** 3. Rutherford s Scattering Experiments
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 informationUNIT 4 NOTES: ATOMIC THEORY & STRUCTURE
S T U D E N T N O T E S P r e - A P C h e m i s t r y U N I T 4 Page 1 NAME PERIOD UNIT 4 NOTES: ATOMIC THEORY & STRUCTURE STUDENT OBJECTIVES: Your fascinating teachers would like you amazing learners
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 informationUNIT 2 - ATOMIC THEORY
UNIT 2 - ATOMIC THEORY VOCABULARY: Allotrope Anion Atom Atomic Mass Atomic Mass unit (a.m.u.) Atomic number Bohr model Cation Compound Electron Electron Configuration Element Excited state Ground state
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 informationUNIT 4 ATOMIC THEORY
UNIT 4 ATOMIC THEORY 1. Atomic theory: Dalton s model Thomson s model Rutherford s model Bohr s model Electron cloud model 2. Particles inside the atom Atomic number Mass number 3. Ions Cations Anions
More informationThe modern model of the atom has evolved over a long period of time through the work of many scientists.(3.1a) Each atom has a nucleus, with an
REGENTS CHEMISTRY 1 The modern model of the atom has evolved over a long period of time through the work of many scientists.(3.1a) Each atom has a nucleus, with an overall positive charge, surrounded by
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 information9/23/2012. Democritus 400 B.C. Greek philosopher Proposed that all materials are made from atoms. Coined Greek word atmos, meaning indivisible.
Mr. Sudbury Atoms are too small to see with your eyes. Atoms are too small to see with the most powerful microscopes. Scientist use models to explain atoms. A scientific model is an representation containing
More informationAn atom is the smallest physical particle of an element that still retains the properties of that element.
Unit 3.1 An atom is the smallest physical particle of an element that still retains the properties of that element. At sea level, one cubic centimeter of air (size of a sugar cube, or marble) will have
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 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 informationIB Chemistry : Atomic Structure & History with Boardworks Enabled Interactives
Atomic Structure Contents INTRODUCING ATOMS SUB ATOMIC PARTICLES HISTORY ATOMIC # & MASS # AVERAGE ATOMIC MASS MASS SPECTROMETER ELECTRON CONFIGURATION ISOTOPES SUMMARY ACTIVITIES ELEMENTS DIFFERENT TYPES
More informationName Date Class ATOMIC STRUCTURE
4 ATOMIC STRUCTURE SECTION 4.1 DEFINING THE ATOM (pages 101 103) This section describes early atomic theories of matter and provides ways to understand the tiny size of individual atoms. Early Models of
More informationChapter 3 https://youtu.be/thndxfdkzzs?list=pl8dpuualjx tphzzyuwy6fyeax9mqq8ogr
Chapter 3 https://youtu.be/thndxfdkzzs?list=pl8dpuualjx tphzzyuwy6fyeax9mqq8ogr The smallest particle of an element that retains the chemical properties of that element. Regions: Nucleus: very small region
More information1 Development of the Atomic Theory
CHAPTER 4 1 Development of the Atomic Theory SECTION Introduction to Atoms BEFORE YOU READ After you read this section, you should be able to answer these questions: What is the atomic theory? How has
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 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 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 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 informationMemorial to a Scientist
Memorial to a Scientist 1. My Question of Inquiry: Use this sheet to outline how you will collect and present the information to the class. My Group s Scientist: 1 Part I: Memorial to a Scientist: John
More informationSection 3.1 Substances Are Made of Atoms
Section 3.1 Substances Are Made of Atoms Objectives: 1. State the three laws that support the existence of atoms. 2. List the five principles of John Dalton s atomic theory. Vocabulary: law of definite
More informationAtomic Theory. Why do we believe that all matter is made of atoms?
Atomic Theory Why do we believe that all matter is made of atoms? 1. Law of definite composition: Compounds (like H 2 O) contain the same elements in the same proportions by mass regardless of the size
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 Period Date Engage-Atoms 1. What does Bill cut in half?
Name Period Date Engage-Atoms https://www.youtube.com/watch?v=fmuskig2exi 1. What does Bill cut in half? 2. By cutting this item in half he tries to prove that there are pieces that are uncut- table called
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 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 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 informationChapter 2 Atoms, Ions, and the Periodic Table. Law of Conservation of Mass. Law of Conservation of Mass
Chapter 2 Atoms, Ions, and the Periodic Table Dalton s Atomic Theory Structure of the Atom Ions Atomic Mass The Periodic Table Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction
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 information4.1 Structure of the Atom
4.1 Structure of the Atom How do atoms differ from each other? What are atoms composed of? What are the subatomic particles? 2-1 Structure of the Atom Atoms actually are divisible. They are composed of
More information7.2 The Bohr Theory of the Atom
7.2 The Bohr Theory of the Atom John Dalton Michael Faraday showed that atoms could gain electric charges J.J. Thompson The atomic theory was once again revised, to include his ideas: Ernest Rutherford
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 informationUNIT 4 NOTES: ATOMIC THEORY & STRUCTURE
S T U D E N T N O T E S P r e - A P C h e m i s t r y U N I T 4 Page 1 UNIT 4 NOTES: ATOMIC THEORY & STRUCTURE STUDENT OBJECTIVES: Your fascinating teachers would like you amazing learners to be able to
More informationAtomic Structure Practice Questions
Atomic Structure Practice Questions 1. Experiments performed to reveal the structure of atoms led scientists to conclude that an atom s (1) positive charge is evenly distributed throughout its volume (2)
More informationATOMIC STRUCTURE. Name: Period: Date: 1) = a generalization of scientific observations that what happens (does explain)
ATOMIC STRUCTURE Name: Period: Date: I. LAW vs. THEORY: 1) = a generalization of scientific observations that what happens (does explain) 2) (model) = a set of assumptions used to explain observations
More informationName: Date: Atomic Structure 2017 Mrs. Mannion Version 1
Name: Atomic Structure 2017 1. The mass of a proton is approximately equal to the mass of A) a beta particle B) an electron C) an alpha particle D) a neutron 2. What are the characteristics of a neutron?
More informationUnit 2 Atomic Structure and Nuclear Chemistry
Chemistry 1 West Linn High School Unit 2 Packet and Goals Name: Period: Unit 2 Atomic Structure and Nuclear Chemistry Unit Goals: As you work through this unit, you should be able to: 1. describe Dalton
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 informationName: Date: ChemT1. 1) Using the diagram above, answer the following question: What can be inferred from the diagram about the structure of the atom?
Name: Date: ChemT1 1) Using the diagram above, answer the following question: What can be inferred from the diagram about the structure of the atom? A. the atom is very small B. the electrons are moving
More informationMake sure this is handed in!
Make sure this is handed in! Based on the 3 groups in early atomic history, pick one of the groups and explain how they progressed the current knowledge of atoms and elements at their time. OR Explain
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 informationBellwork: 2/6/2013. atom is the. atom below. in an atom is found in the. mostly. 2. The smallest part of an. 1. Label the parts of the
Bellwork: 2/6/2013 1. Label the parts of the atom below. B 2. The smallest part of an atom is the. 3. The majority of the mass in an atom is found in the. A C 4. An atom is made up of mostly. Bellwork:
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 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 informationBinder. Notes: DO NOW
CONTENT OBJECTIVE: SWBAT EXPLAIN HOW THE MODEL OF THE ATOM HAS EVOLVED. Binder HW for checking: 2.1 HW SKILL OBJECTIVES: SWBAT STOP AND THINK ALOUD TO MAKE SURE OF THEIR UNDERSTANDING SWBAT HIGHLIGHT FOR
More informationAccelerated Chemistry Study Guide Atomic Structure, Chapter 3
Accelerated Chemistry Study Guide Atomic Structure, Chapter 3 Terms and definitions atom ion law of constant composition isotope atomic theory of matter mass number cathode ray tube atomic mass electron
More informationChapter 3. Atoms: Building Blocks of Matter
Chapter 3 Atoms: Building Blocks of Matter Atom: means, from Democritus (Greek, 400BC) Atom: smallest particle of an element that retains the of that element Chemical Reaction: transformation of substances
More informationDirected Reading B. Section: Development of the Atomic Theory THE BEGINNING OF ATOMIC THEORY. is a(n). DALTON S ATOMIC THEORY BASED ON EXPERIMENTS
Skills Worksheet Directed Reading B Section: Development of the Atomic Theory THE BEGINNING OF ATOMIC THEORY 1. The word atom comes from the Greek word atomos, which means a. dividable. b. invisible. c.
More information9.11 Atomic Theory. My Future Matters. Objectives: - SWBAT describe and explain the four historical models of the atom and how they evolved over time.
9.11 Atomic Theory Objectives: - SWBAT describe and explain the four historical models of the atom and how they evolved over time. Read & Analyze: Directions: Read the following text. While you are reading
More informationChapter 3. Table of Contents. Section 1 The Atom: From Philosophical Idea to Scientific Theory. Section 2 The Structure of the Atom
Atoms: The Building Blocks of Matter Table of Contents Section 1 The Atom: From Philosophical Idea to Scientific Theory Section 2 The Structure of the Atom Section 1 The Atom: From Philosophical Idea to
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 informationAtomic Concepts and Nuclear Chemistry Regents Review
1. In the late 1800s, experiments using cathode ray tubes led to the discovery of the 10.Compared to an atom of phosphorus-31, an atom of sulfur-32 contains A) electron B) neutron C) positron D) proton
More informationHow to Use This Presentation
How to Use This Presentation To View the presentation as a slideshow with effects select View on the menu bar and click on Slide Show. To advance through the presentation, click the right-arrow key or
More informationdemocritus (~440 bc) who was he? theorized: A Greek philosopher
democritus (~440 bc) who was he? A Greek philosopher theorized: Everything in the world is made up small particles that we cannot see The shape of these particles determine the properties of a substance
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 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 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 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 informationTitle: Chem Review 2 TOPIC: DISCOVERY OF ATOM
Title: Chem Review 2 TOPIC: DISCOVERY OF ATOM EQ: How were the 3 subatomic particles discovered? Title and Highlight Topic: EQ: Date Reflect Question: Reflect on the material by asking a question (its
More informationExam Accelerated Chemistry Study Sheet Chap 04 The Atom/Periodic Table
Exam Accelerated Chemistry Study Sheet Chap 04 The Atom/Periodic Table Name /87 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. Correct the False statements by changing
More informationPassing an electric current makes a beam appear to move from the negative to the positive end.
Chapter 4 Atoms and their structure History of the atom Not the history of atom, but the idea of the atom. Original idea Ancient Greece (400 B.C.) Democritus and Leucippus Greek philosophers. Smallest
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 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 informationChapter 4: Atomic Structure Section 4.1 Defining the Atom
Chapter 4: Atomic Structure Section 4.1 Defining the Atom Early Models of the Atom atom the smallest particle of an element that retains its identity in a chemical reaction Democritus s Atomic Philosophy
More information