Atomic Calculations. 2.1 Composition of the Atom. number of protons + number of neutrons = mass number
|
|
|
- Kerry Lane
- 2 years ago
- Views:
Transcription
1 2.1 Composition of the Atom Atomic Calculations number of protons + number of neutrons = mass number number of neutrons = mass number - number of protons number of protons = number of electrons IF positive and negative charges cancel, the atom Charge = 0
2 2.1 Composition of the Atom Selected Properties of the Three Basic Subatomic Particles Name Charge Mass(amu) Mass (grams) Electrons (e) x x Protons (p) X Neutrons (n) x 10-24
3 2.1 Composition of the Atom Determining the Composition of an Calculate the number of protons, neutrons and electrons in each of the following: B Fe Atom
4 2.1 Composition of the Atom Isotopes - atoms of the same element having different masses contain same number of protons 4 contain different numbers of neutrons Isotopes of Hydrogen Hydrogen (Hydrogen - 1) Isotopes Deuterium (Hydrogen - 2) Tritium (Hydrogen - 3)
5 2.1 Composition of the Atom Isotopic Calculations Isotopes of the same element have identical chemical properties Some isotopes are radioactive Find chlorine on the periodic table What is the atomic number of chlorine? 17 What is the mass given This is not the mass number of an isotope
6 2.1 Composition of the Atom Atomic Mass What is this number, 35.34? The atomic mass - the weighted average of the masses of all the isotopes that make up chlorine Chlorine consists of chlorine-35 and chlorine-37 in a 3:1 ratio Weighted average is an average corrected by the relative amounts of each isotope present in nature
7 2.1 Composition of the Atom Determining Atomic Mass Calculate the atomic mass of naturally occurring chlorine if 75.77% of chlorine atoms are chlorine-35 and 24.23% of chlorine atoms are chlorine-37 Step 1: convert the percentage to a decimal fraction chlorine chlorine-37
8 2.1 Composition of the Atom Step 2: Multiply the decimal fraction by the mass of that isotope to obtain the isotope contribution to the atomic mass. For chlorine-35: x amu = amu For chlorine x amu = amu Step 3: sum these partial weights to get the weighted average atomic mass of chlorine: amu amu = amu
9 2.1 Composition of the Atom Atomic Mass Determination Nitrogen consists of two naturally occurring isotopes 99.63% nitrogen-14 with a mass of amu 0.37% nitrogen-15 with a mass of amu What is the atomic mass of nitrogen?
10 2.1 Composition of the Atom Ions Ions - electrically charged particles that result from a gain or loss of one or more electrons by the parent atom Cation - positively charged result from the loss of electrons 23 Na 23 Na + + 1e - Anion - negatively charged results from the gain of electrons 19 F + 1 e - 19 F -
11 2.2 Development of Atomic Theory Dalton s Atomic Theory - the first experimentally based theory of atomic structure of the atom.
12 Postulates of Dalton s Atomic Theory 2.2 Development of Atomic Theory 1. All matter consists of tiny particles called atoms 2. An atom cannot be created, divided, destroyed, or converted to any other type of atom 3. Atoms of a particular element have identical properties
13 2.2 Development of Atomic Theory 4. Atoms of different elements have different properties 5. Atoms of different elements combine in simple whole-number ratios to produce compounds (stable aggregates of atoms) 6. Chemical change involves joining, separating, or rearranging atoms Postulates 1, 4, 5 and 6 are still regarded as true.
14 2.2 Development of Atomic Theory Evidence for Subatomic Particles: Electrons, Protons and Neutrons Electrons were the first subatomic particles to be discovered using the cathode ray tube Indicated that the particles were negatively charged.
15 Evidence for Protons and 2.2 Development of Atomic Theory Neutrons Protons were the next particle to be discovered, by Goldstein Protons have the same size charge but opposite in sign Proton is 1837 times as heavy as electron Neutrons Postulated to exist in 1920 s but not demonstrated to exist until 1932 Almost the same mass as the proton
16 Evidence for the Nucleus 2.2 Development of Atomic Theory Initial assumed protons and neutrons were uniformly distributed throughout the atom Ernest Rutherford s Gold Foil Experiment lead to the understanding of the nucleus Most alpha particles pass through the foil without being deflected Some particles were deflected, a few even directly back to the source
17 Rutherford s Gold Foil Experiment 2.2 Development of Atomic Theory Most of the atom is empty space The majority of the mass is located in a small, dense region
18 Models of the Atom (a) Thomson (b) Rutherford 2.3 Light, Atomic Structure, and the Bohr Atom
19 2.3 Light, Atomic Structure, and the Bohr Atom Rutherford s atom tiny, dense, positively charged nucleus of protons surrounded by electrons How do we describe the relationship of the electrons to each other and the nucleus? Use the measurement of particle energy rather than position
20 2.3 Light, Atomic Structure, and the Bohr Atom Light and Atomic Structure Spectroscopy - absorption or emission of light by atoms. Used to understand the electronic structure. To understand the electronic structure, we must first understand light, electromagnetic radiation travels in waves from a source speed of 3.0 x 10 8 m/s
21 2.3 Light, Atomic Structure, and the Bohr Atom Wavelengths Light is propagated (moves) as a collection of sine waves Wavelength is the distance between identical points on successive waves Each wavelength travels at the same velocity, but has its own characteristic energy
22 Electromagnetic Spectrum high energy short wavelength low energy long wavelength
23 2.3 Light, Atomic Structure, and the Bohr Atom Bohr Theory Atoms can absorb and emit energy via promotion of electrons to higher energy levels and relaxation to lower levels Energy that is emitted upon relaxation is observed as a single wavelength of light Spectral lines are a result of electron transitions between allowed levels in the atoms
24 2.3 Light, Atomic Structure, and the Bohr Atom The emission spectrum - light of hydrogen emitted when lead to a the substance modern is understanding excited by of energy the source. electronic structure of the atom
25 The Bohr Atom Electrons exist in fixed energy levels surrounding the nucleus Quantization of energy Promotion of electron occurs as it absorbs energy Excited State Energy is released as the electron travels back to lower levels Relaxation
9/13/2013. However, Dalton thought that an atom was just a tiny sphere with no internal parts. This is sometimes referred to as the cannonball model.
John Dalton was an English scientist who lived in the early 1800s. Dalton s atomic theory served as a model for how matter worked. The principles of Dalton s atomic theory are: 1. Elements are made of
Theories of Matter Composition
Chapter 2 Theories of Matter Composition Democritus (5 th 4 th century BC) ATOMISM Aristotle (4 th 5 th century BC) CONTINUOUS MATTER FOUR ELEMENTS Earth, Air, Fire, Water Boyle (17 th century) Reintroduced
5 Early Atomic Theory and Structure. Chapter Outline. Dalton s Model of the Atom. Dalton s Model of the Atom. Dalton s Model of the Atom 10/2/2013
5 Early Atomic Theory and Structure Chapter Outline 5.1 5.2 Electric Charge A. Discovery of Ions 5.3 Subatomic Parts of the Atom Lightning occurs when electrons move to neutralize charge difference between
CHM1 Exam 4 Review. Topics. 1. Structure of the atom a. Proton nucleus + 1 amu b. Neutron nucleus 0 1 amu c. Electron orbits - 0 amu 2.
Topics 1. Structure of the atom a. Proton nucleus + 1 amu b. Neutron nucleus 0 1 amu c. Electron orbits - 0 amu 2. Atomic symbols Mass number (protons + neutrons) 4+ charge 126C atomic number (# protons)
UNIT 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
ATOMS A T O M S, I S O T O P E S, A N D I O N S. The Academic Support Center @ Daytona State College (Science 120, Page 1 of 39)
ATOMS A T O M S, I S O T O P E S, A N D I O N S The Academic Support Center @ Daytona State College (Science 120, Page 1 of 39) THE ATOM All elements listed on the periodic table are made up of atoms.
The Beginnings of Atomic Theory
Atoms Section 1 The Beginnings of Atomic Theory Who came up with the first theory of atoms? In the fourth century BCE, the Greek philosopher Democritus suggested that the universe was made of indivisible
Introduction to Atoms
Introduction to Atoms What is the smallest particle into which an element can be divided and still be the same substance? A. electron B. neutron C. proton D. atom What is the smallest particle into which
Mr. Dolgos Regents Chemistry NOTE PACKET. Unit 2: Atomic Theory
*STUDENT* *STUDENT* Mr. Dolgos Regents Chemistry NOTE PACKET Unit 2: Atomic Theory 1 *STUDENT* UNIT 2 - ATOMIC THEORY *STUDENT* VOCABULARY: Allotrope Anion Atom Atomic Mass Atomic Mass unit (a.m.u.) Atomic
Chapter 5: Early Atomic Theory and Structure. 5.1 Early Thoughts. In the year 440 B.C., believed that all matter was made of 4 elements (list them):
Chapter 5: Early Atomic Theory and Structure Name: 5.1 Early Thoughts In the year 440 B.C., believed that all matter was made of 4 elements (list them): Around 370 B.C., proposed that all matter was composed
Atomic Structure Practice Test
Atomic Structure Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. If 6.0 g of element K combine with 17 g of element L, how many grams of
The Atom. Unit 3 Atomic Structure And Nuclear Chemistry. Ancient Ideas of the Atom. Ancient Ideas of the Atom. Ancient Ideas of the Atom
1 The Atom Unit 3 Atomic Structure And Nuclear Chemistry What are the basic parts of an atom? How is an atom identified? What is nuclear chemistry? How is a nuclear equation written? Atom Smallest particle
Atomic Theory. Chapter 3. History of the Atom. Structure & Models of Atoms
Chapter 3 Atoms Atomic Theory As early as 400 BC scientists have believed in an atomic theory thanks to Democritus. Atoms were the building blocks of matter. 2000 years later we can see the atom! History
Chemistry 101 Chapter 2 ATOMIC MODEL. atoms (Carbon atoms in diamond) molecules (H 2 O molecules in water) ions (Na + and Cl ions in sodium chloride)
ATOMIC MODEL All forms of matter are made up of PARTICLES These PARTICLES may be: atoms (Carbon atoms in diamond) molecules (H 2 O molecules in water) ions (Na + and Cl ions in sodium chloride) The particulate
CHEM 1411 Chapter 5 Homework Answers
1 CHEM 1411 Chapter 5 Homework Answers 1. Which statement regarding the gold foil experiment is false? (a) It was performed by Rutherford and his research group early in the 20 th century. (b) Most of
1) Scientific law = a generalization of scientific observations that describes what happens (does not explain)
I. Law vs. Theory 1) Scientific law = a generalization of scientific observations that describes what happens (does not explain) 2) Theory (model) = a set of assumptions used to explain observations and
Page 1. Atomic Theory
About 440 B.C. Empedocles stated that all matter was composed of four "elements" earth, air, water, and fire. Democritus (460-370 BC) Theorized that all matter is composed of small indivisible particles
The Structure of the Atom
Before You Read Review scientific law Define the following terms describes a relationship in nature that is supported by many experiments theory an explanation supported by many experiments; is still subject
Early History of Atomic Theories
ATOMIC THEORY Early History of Atomic Theories Greek Philosophers Proposed that all matter was made up of four basic particles: Air Earth Fire Water Empedocles Democritus Proposed that matter was made
AIM: Models of the Atom DO NOW:
AIM: Models of the Atom DO NOW: HW: ON A SEPARATE SHEET OF PAPER MAKE A TIMELINE OF THE HISTORY AND DEVELOPMENT OF THE ATOM. INCLUDE: 1. DALTON S MODEL, J. J. THOMPSON S MODEL, RUTHERFORD MODEL, BOHR MODEL,
CHAPTER 4: ATOMIC STRUCTURE. Intro Video! (nothing about Bohr, I promise)
CHAPTER 4: ATOMIC STRUCTURE Intro Video! (nothing about Bohr, I promise) I. HISTORY OF ATOMIC THEORY A. Highlights: 1. Democritus: suggested matter was made of tiny indivisible particles 2. Aristotle:
CHAPTER 5: MODELS OF THE ATOM
CHAPTER 5: MODELS OF THE ATOM Problems: 1, 5, 7,11,13,15,17,19,21,25, 37,39,41,61,67,69,71,73, 77ab,79ab,81,83,87,89 1981 - STM (scanning tunneling microscope) used to "see" atoms STM Images - Web sites:
Chapter Five: Atomic Theory and Structure
Chapter Five: Atomic Theory and Structure 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
Atoms, Molecules, Formulas, and Subatomic Particles
Introduction to Chemistry Chapter 5 1 Atoms, Molecules, Formulas, and Subatomic Particles The Atom: The smallest particle of an element that can exist and still have the properties of the element building
Atomic Theory. Democritus was known as The Laughing Philosopher. Democritus s version of the atom
Democritus (460 B.C.E.) and the Greek Philosophers Before we discuss the experiments and evidence that have convinced scientists matter is made up of atoms, it is only fair to credit the man who proposed
Chapter 5 Atomic Structure and the Periodic Table. Section 5.1 Atoms
Chapter 5 Atomic Structure and the Periodic Table Section 5.1 Atoms OBJECTIVES: Summarize Dalton s atomic theory. Describe the size of an atom. Adapted from notes by Stephen L. Cotton History of the atom
History of the Atomic Model. Bohr s Model of the Atom
Bohr s Model of the Atom Niels Bohr (93) was the first to propose that the periodicity in the properties of the elements might be explained by the electronic structure of the atom Democritus (400 B.C.)
History of the Atom & Atomic Theory
Chapter 5 History of the Atom & Atomic Theory You re invited to a Thinking Inside the Box Conference Each group should nominate a: o Leader o Writer o Presenter You have 5 minutes to come up with observations
Name Date Class ATOMIC STRUCTURE
Name Date Class 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.
Standardized Test Preparation. Chapter 3. Preview. Multiple Choice Short Answer Extended Response
Preview Short Answer Extended Response 1. A chemical compound always has the same elements in the same proportions by mass regardless of the source of the compound. This is a statement of A. the law of
6.7: Explaining the Periodic Table pg. 234
Unit C: Atoms, elements, and Compounds 6.7: Explaining the Periodic Table pg. 234 Key Concepts: 3. Elements are organized according to their atomic number and electron arrangement on the periodic table.
Chapter 3 Atoms and Elements
Chapter 3 Atoms and Elements 1 Elements Elements are pure substances that cannot be separated into simpler substances by ordinary laboratory processes the building blocks of matter listed on the inside
What Is in an Atom? Visual Concept: Parts of the Atom. Atomic Number and Mass Number. What Is in an Atom?, continued
What Is in an Atom? Visual Concept: Parts of the Atom What is the difference between protons, neutrons, and electrons? The three main subatomic particles are distinguished by mass, charge, and location
NOTES ON The Structure of the Atom
NOTES ON The Structure of the Atom Chemistry is the study of matter and its properties. Those properties can be explained by examining the atoms that compose the matter. An atom is the smallest particle
Name Class Date ELECTRONS AND THE STRUCTURE OF ATOMS
Atomic Structure ELECTRONS AND THE STRUCTURE OF ATOMS 4.1 Defining the Atom Essential Understanding Atoms are the fundamental building blocks of matter. Lesson Summary Early Models of the Atom The scientific
Aristotle. Lived 384 B.C. to 348 B.C. in ancient Greece. Proposed matter was made of 4 elements, earth, air, water, and fire
Aristotle Lived 384 B.C. to 348 B.C. in ancient Greece Proposed matter was made of 4 elements, earth, air, water, and fire Each of those were also described as being a combination of either cold or hot
CHEMISTRY Matter and Change
CHEMISTRY Matter and Change Chapter 4: The Structure of the Atom CHAPTER 4 Section 4.1 Section 4.2 Section 4.3 Section 4.4 Table Of Contents Early Ideas About Matter Defining the Atom How Atoms Differ
Objectives. PAM1014 Introduction to Radiation Physics. Constituents of Atoms. Atoms. Atoms. Atoms. Basic Atomic Theory
PAM1014 Introduction to Radiation Physics Basic Atomic Theory Objectives Introduce and Molecules The periodic Table Electronic Energy Levels Atomic excitation & de-excitation Ionisation Molecules Constituents
1. According to the modern model of the atom, the nucleus of an atom is surrounded by one or more
1. According to the modern model of the atom, the nucleus of an atom is surrounded by one or more 8. The diagram below represents the nucleus of an atom. A) electrons B) neutrons C) positrons D) protons
Chapter 2. Atoms and Elements
Chapter 2. Atoms and Elements John Dalton Robert Millikan J.J. Thomson Ernest Rutherford The Components of Matter Elements, Compounds, Mixtures Dalton s Atomic Theory Modern Atomic Theory Atomic and Mass
Chapter 2. Atomic Theory
Chapter 2 Atomic Theory 400 B.C.E. atomists 1804 C.E. Dalton 1903 Thompson A History of Atomic Models 1932 Chadwick 1913 Bohr 1911 Rutherford Early Philosophy of Matter Some early philosophers believed
Atomic Structure Model Timeline. Dalton Thomson Rutherford Bohr Cloud
Atomic Structure Model Timeline Dalton Thomson Rutherford Bohr Cloud 1803 1897 1911 1913 1926 Dalton s Model (p.161) Dalton proposed the first model of atoms; he thought atoms were a solid sphere Dalton
How did scientists determine the structures that are inside an atom?
Chapter 4 Atomic Structure 4.1 Defining the Atom 4.2 Structure of the Nuclear Atom 4.3 Distinguishing Among Atoms 1 Copyright Pearson Education, Inc., or its affiliates. All Rights Reserved. CHEMISTRY
Test 2: Atomic Structure Review
Name: Monday, October 15, 2007 Test 2: Atomic Structure Review 1. Figure 1 The diagram shows the characteristic spectral line patterns of four elements. Also shown are spectral lines produced by an unknown
UNIT 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
2 The Structure of Atoms
CHAPTER 4 2 The Structure of Atoms SECTION Atoms KEY IDEAS As you read this section, keep these questions in mind: What do atoms of the same element have in common? What are isotopes? How is an element
The Structure of the Atom
The Structure of the Atom Section 4.1 Early Ideas About Matter Section 4.2 Defining the Atom Section 4.3 How Atoms Differ Section 4.4 Unstable Nuclei and Radioactive Decay Click a hyperlink or folder tab
Chapter 2: Atoms, Molecules and Ions. Dalton s Atomic Theory ( ) Postulates
Chapter 2: Atoms, Molecules and Ions The topics in this chapter should be review from a previous course. It is expected that you are able to review and master this material quickly and somewhat independently.
Early Atomic Theory and Structure. Beginning Days (Theory of an Atom) Beginning Days 8/14/2011. Chapter 5
Early Atomic Theory and Structure Chapter 5 Beginning Days (Theory of an Atom) 5 th century B.C., Greek philosophers Empedocles and Democritus proposed their own theories about an atom. Empedocles stated
Name Date Period. Chemistry: Unit 3 - Atoms Test Review KEY
Name Date Period Concepts to know for the Unit 3 test: Chemistry: Unit 3 - Atoms Test Review KEY 1. Summarize the major experimental evidence that led to the development of various atomic models, both
Introduction to Atoms
CHAPTER 11 VOCABULARY & NOTES WORKSHEET Introduction to Atoms By studying the Vocabulary and Notes listed for each section below, you can gain a better understanding of this chapter. CHAPTER 11 SECTION
Section 1: Development of the Atomic Theory Pages 82-87
Study Guide Chapter 4 Atomic Theory and The Atom Section 1: Development of the Atomic Theory Pages 82-87 THE BEGINNING OF ATOMIC THEORY 1. What does the word atom mean? a. dividable b. invisible c. hard
2014 Spring CHEM101 Ch1-2 Review Worksheet Modified by Dr. Cheng-Yu Lai,
Ch1 1) Which of the following underlined items is not an intensive property? A) A chemical reaction requires 3.00 g of oxygen. B) The density of helium at 25 C is 1.64 10-4 g/cm3. C) The melting point
Chapter 18: The Structure of the Atom
Chapter 18: The Structure of the Atom 1. For most elements, an atom has A. no neutrons in the nucleus. B. more protons than electrons. C. less neutrons than electrons. D. just as many electrons as protons.
Chemistry I Study Guideline Unit Three Atomic Structure
Chemistry I Study Guideline Unit Three Atomic Structure By the end of this chapter, you should be able to: 1. Describe the nature and significance of scientific modeling in general and several of the atoms
b. How is the modern periodic table arranged? In order of increasing atomic number
Unit 3 Review Chapters 4 (Atomic Structure) & 6 (Periodic Table) Part 1: Answer the following questions. 1. a. Which scientist created the first modern atomic theory? John Dalton b. What was his theory?
Atomic Theory Test 3.1
Name: Atomic Theory Test 3.1 Multiple Choice 1. What is the total number of electrons in the 2p sublevel of a chlorine atom in the ground state? 6; (2) 2; (3) 3; 5. 2. Rutherford's model of the atom postulated
Level 3 Achievement Scale
Unit 1: Atoms Level 3 Achievement Scale Can state the key results of the experiments associated with Dalton, Rutherford, Thomson, Chadwick, and Bohr and what this lead each to conclude. Can explain that
Chapter 2 Atoms, Ions, and the Periodic Table
Chapter 2 Atoms, Ions, and the Periodic Table 2.1 (a) neutron; (b) law of conservation of mass; (c) proton; (d) main-group element; (e) relative atomic mass; (f) mass number; (g) isotope; (h) cation; (i)
Name: Class: Date: ID: A
Name: Class: _ Date: _ ID: A Chapter 4 Assessment Multiple Choice Identify the choice that best completes the statement or answers the question. 1. One of the first people to state that matter is made
1/7/2013. Chapter 2. Atoms and the Periodic Table. Chemistry: Atoms First Julia Burdge & Jason Overby. 2.1 Atoms First
Chemistry: Atoms First Julia Burdge & Jason Overby 2 Atoms and the Periodic Table Chapter 2 Atoms and the Periodic Table Kent L. McCorkle Cosumnes River College Sacramento, CA Copyright (c) The McGraw-Hill
The Structure of the Atom
The Structure of the Atom Section 4.1 Early Ideas About Matter In your textbook, read about the philosophers, John Dalton, and defining the atom. For each statement below, write true or false. 1. Ancient
Chapter Two Study Guide Answers
Chapter Two Study Guide Answers Concepts 1. Know the law of conservation of mass 2. Know about the structure of the atom and who did what including Thomson, Rutheford, Millikan, Bohr 3. Know the three
Part B 2. Answer all questions in this part.
Part B 2 Answer all questions in this part. Directions (51 65): Record your answers in the spaces provided in your answer booklet. Some questions may require the use of the 2011 Edition Reference Tables
Elements, Atoms & Ions
Introductory Chemistry: A Foundation FOURTH EDITION by Steven S. Zumdahl University of Illinois Elements, Atoms & Ions Chapter 4 1 2 Elements Aims: To learn about the relative abundances of the elements,
History of Atomic Theory
History of Atomic Theory Alchemy ~ Before 400 B.C. Experiment: Pseudoscience concerned with: Changing metal to gold Finding an eternal life elixir Aristotle Beliefs: All matter was made up of a combination
SCH 3UI Unit 2 Outline Up to Quiz #1 Atomic Theory and the Periodic Table
Lesson Topics Covered SCH 3UI Unit 2 Outline Up to Quiz #1 Atomic Theory and the Periodic Table 1 Note: History of Atomic Theory progression of understanding of composition of matter; ancient Greeks and
For convenience, we may consider an atom in two parts: the nucleus and the electrons.
Atomic structure A. Introduction: In 1808, an English scientist called John Dalton proposed an atomic theory based on experimental findings. (1) Elements are made of extremely small particles called atoms.
Unit 1 Practice Test. Matching
Unit 1 Practice Test Matching Match each item with the correct statement below. a. proton d. electron b. nucleus e. neutron c. atom 1. the smallest particle of an element that retains the properties of
The Structure and History of the Atom Test Friday Jan 25 th
PA Problem Set 1 Due Wed Jan 23 rd The Structure and History of the Atom Test Friday Jan 25 th Your work is to be done on separate sheets of paper. All of the papers should be stapled together in the upper
Atomic Structure Timeline
Atomic Structure Timeline Use the following information to fill out your foldable. You will be responsible for the information found on this PowerPoint presentation. Democritus (400 B.C.) Proposed that
4.01 Evolution of the Atomic Theory
4.01 Evolution of the Atomic Theory The Events Leading to the Discovery of the Building Block of Matter Dr. Fred Omega Garces Chemistry 152 Miramar College 1 401 Atomic Evolution Idea of the Atom How did
3.02 Evolution of the Atomic Theory
3.02 Evolution of the Atomic Theory The Events Leading to the Discovery of the Building Block of Matter Dr. Fred Omega Garces Chemistry 100 Miramar College 1 3.02 Atomic Evolution Idea of the Atom How
Chapter 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 Suggested Chapter 7 Problems: 37, 39,
A technician using a scanner to monitor the uptake of radioactive iodine in a patient s thyroid. P.48
A technician using a scanner to monitor the uptake of radioactive iodine in a patient s thyroid. P.48 Rodioactivity In the late nineteenth century scientists discovered that certain elements produce high-energy
( + and - ) ( - and - ) ( + and + ) Atoms are mostly empty space. = the # of protons in the nucleus. = the # of protons in the nucleus
Atoms are mostly empty space Atomic Structure Two regions of every atom: Nucleus - is made of protons and neutrons - is small and dense Electron cloud -is a region where you might find an electron -is
The Evolution of the Atom
The Evolution of the Atom 1808: Dalton s model of the atom was the billiard ball model. He thought the atom was a solid, indivisible sphere. Atoms of each element were identical in mass and their properties.
Subatomic Particle Data and a Periodic Table of the Elements can be found at the End of the Exam.
CHEM 109 Introduction to Chemistry Fall 2016 Name: Examination 3 Multiple Choice Questions Subatomic Particle Data and a Periodic Table of the Elements can be found at the End of the Exam. 1. Elemental
The History of the Atom
The History of the Atom Timeline: 400 BC Scientist: Democritus (Greek Philosopher) Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible). atom.
ATOMIC STRUCTURE AND THE PROPERTIES OF MATTER
SUBAREA I. ATOMIC STRUCTURE AND THE PROPERTIES OF MATTER COMPETENCY 1.0 UNDERSTAND THE VARIOUS MODELS OF ATOMIC STRUCTURE, THE PRINCIPLES OF QUANTUM THEORY, AND THE PROPERTIES AND INTERACTIONS OF SUBATOMIC
Name Hour Date. 2. A positively charged particle with a mass of 1 amu is called a. (neutron or proton)
Name Hour Date CHAPTER 12 INTRODUCTION TO ATOMS Chapter 12 Test USING VOCABULARY To complete the following sentences, choose the correct term from each pair of terms listed, and write the term in the blank.
Chapter 4: Atoms and Elements
C h e m i s t r y 1 2 C h 4 : A t o m s a n d E l e m e n t s P a g e 1 Chapter 4: Atoms and Elements Bonus Problems: 27, 29, 33, 35, 45, 51, 53, 67, 69, 73, 83, 87, 93, 95, 107, 109 Early Ideas on Matter:
ATOMIC STRUCTURE AND THE PERIODIC TABLE
5 ATOMIC STRUCTURE AND THE PERIODIC TABLE Conceptual Curriculum Concrete concepts More abstract concepts or math/problem-solving Standard Curriculum Core content Extension topics Honors Curriculum Core
Name: Period: Date: Unit 3 Practice Review (the questions on the test are NOT the same as the review questions)
Name: Period: Date: Unit 3 Review: things you will need to know 1. Atomic Theories: Know all the scientists in order. What did they discover? What experiment did they use? 2. Development of the periodic
Surviving Chemistry. One Concept at a Time. Engaging and Easy-to-learn Guided Study of High School Chemistry
Surviving Chemistry One Concept at a Time Atomic Structure Engaging and Easy-to-learn Guided Study of High School Chemistry Guided Study Book. One Concept at a Time A Guided Study and Workbook for High
Atom The Discovery of. Atom. Rutherford s Model of the Atom. Particles. Isotopes. Chapter 8: Composition of the
Chapter 8: Composition of the Atom The Discovery of Subatomic Particles Rutherford s Model of the Atom Atomic Number and Isotopes Chapter 8: Composition of the Atom The Discovery of Subatomic Particles
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
CHE 1400 - Summer 2015 - Chapter 3 Homework 3 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)The isotope 31 P is also called 15 A) phosphorus-16
The Models of the Atom
The Models of the Atom All life, whether in the form of trees, whales, mushrooms, bacteria or amoebas, consists of cells. Similarly, all matter, whether in the form of aspirin, gold, vitamins, air or minerals,
Multiple Choice Questions
Chapter 4 STRUCTURE OF THE ATOM Multiple Choice Questions 1. Which of the following correctly represent the electronic distribution in the Mg atom? 3, 8, 1 (b) 2, 8, 2 (c) 1, 8, 3 (d) 8, 2, 2 2. Rutherford
Atoms and elements. Checkup. Checkups and follow-ups. 1 WHAT IS AN ATOM? (pp. 6 17) EST Questions 1 38 and A C
EST Questions 1 38 and A C Checkup 1 WHAT IS AN ATOM? (pp. 6 17) 1. Why is it useful to represent an atom with a model? Because an atom is too small to be examined directly. 2. Look at the two photos below.
[Document title] [Document subtitle] Chemistry Revision Notes By Johnathan Reynolds
![[Document title] [Document subtitle] Chemistry Revision Notes By Johnathan Reynolds](/thumbs/51/27780765.jpg "[Document title] [Document subtitle] Chemistry Revision Notes By Johnathan Reynolds")
[Document title] [Document subtitle] Chemistry Revision Notes By Johnathan Reynolds Leaving Certificate Chemistry (Higher & Ordinary Level) Points to note about the Chemistry examination: 1. Higher & Ordinary
PSI AP Chemistry Unit 1 MC Homework. Laws of Multiple and Definite Proportions and Conservation of Mass
PSI AP Chemistry Unit 1 MC Homework Name Laws of Multiple and Definite Proportions and Conservation of Mass 1. Dalton's atomic theory explained the observation that the percentage by mass of the elements
Chapter 4 Review. Name: Class: Date:
Name: Class: Date: Chapter 4 Review 1. According to, all matter was made up of four elements: earth, air, fire, and water. 2. Unlike Democritus, Aristotle did not believe that matter was composed of tiny,
Are Atoms Indivisible?
Activity 4 Are Atoms Indivisible? Activity 4 Are Atoms Indivisible? GOALS In this activity you will: Observe the behavior of a cathode ray in the presence of a magnet. Discuss Thomson s conclusions from
Final Semester 1 Review Sheet
Final Semester 1 Review Sheet Chapter 1&3 What is Chemistry Matter Mass Weight Scientific method o Observation Observation vs. inference (know the difference) Qualitative data Quantitative data o Hypothesis
Atomic Theory. page 1
Atomic Theory I. Handout: Condensed Unit Notes II. Black Box Model III. Early Theories - 400 B.C. i. Common Greek theory was that all matter consisted of four "elements" - earth, air, fire, and water.
Worked solutions to student book questions Chapter 2 A particle view of matter
Q1. Dalton and Thomson each proposed a model of an atom. a What experimental evidence did Thomson have that was not available to Dalton? b As a result of this experimental evidence, how did Thomson s model
HISTORY OF THE ATOM ATOMA
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 could not be divided and
EARLY ATOMIC THEORY AND STRUCTURE
CHAPTER 5 EARLY ATOMIC THEORY AND STRUCTURE SOLUTIONS TO REVIEW QUESTIONS 1. Elements are composed of indivisable particles called atoms. Atoms of the same element have the same properties; atoms of different
Contacts. Principal. Haq Nawaz M.phil, MSc with distinction (UK), Applied chemistry with distinction (UK)
ADMISSION OPEN FROM 9 TH TO F.SC. SLPS/C BAKHTA THANA Contacts. Principal. Haq Nawaz M.phil, MSc with distinction (UK), Applied chemistry with distinction (UK) 03419252988 email. 0917351@rgu.ac.uk Farooq