Year 9 Chemistry Final Exam Answers
|
|
|
- Grant Hoover
- 6 years ago
- Views:
Transcription
1 1
2 16. The diagrams below show the arrangement of atoms or molecules in five different substances A, B, C, D and E. Each of the circles, and represents an atom of a different element. Give the letter of the diagram which represents: (i) a mixture of gases; B [1] (ii) a single compound. D [1] 17. The diagram below shows a model of a chemical reaction between two substances. How can you tell from the diagram that a chemical reaction took place between substance P and substance Q? any one from * a compound or a new substance has been formed * R or the product is a new substance accept the ratio is always 1P to 2Qs accept the atoms or particles have joined accept the elements have joined [2] 2
![18. The particles in a solid cannot spread out Tick ( ) two reasons why particles in a solid cannot spread out. [2] The particles are already too far apart.](/docs-images/77/75139957/images/3-2.jpg "The particles in a solid do not move around. Solids have a fixed shape. Solids can only take on the shape of a container. The pressure in a solid is too great. 19. ATOMOS: means a. Invisible b.")
3 18. The particles in a solid cannot spread out Tick ( ) two reasons why particles in a solid cannot spread out. [2] The particles are already too far apart. The particles in a solid do not move around. Solids have a fixed shape. Solids can only take on the shape of a container. The pressure in a solid is too great. 19. ATOMOS: means a. Invisible b. Indivisible c. Untouchable d. Unfavorable 20. In the 18 th Century, scientists had different ideas about how particles react. When metals burn in air, they lose something to the air and a powder is formed. When metals burn in air, they gain something to the air and a powder is formed. John Dalton ( ) Dmitri Mendeleev ( ) Imagine you want to investigate the ideas of Dalton and Mendeleev. Write your plan. In your plan you must give: the one factor you would change as you carry out your investigation (the independent variable); [1] * the metal one factor you would observe or measure to collect your results (the dependent variable); [1] any one from * the change in the mass of the metal after burning * the change in the mass of the metal after burning accept whether the mass of metal increases or decreases or stays the same accept weight before and after burning 3
4 one of the factors you would keep the same as you carry out your investigation (the control variable); [1] * make sure all the product is weighed accept starting mass of metal accept mass of the metal accept enough time for the reaction to occur accept sufficient heat for burning to occur accept burn the metals for the same length of time award a mark for any suitable rigour in the procedure or identification of any control variable the atmosphere it is heated in is insufficient the evidence that would support Mendeleev s idea. [1] * an increase in the mass following burning for all three metals accept mass will increase accept weight increase 21. This question is about elements. (a) Draw straight lines to match the element with its correct chemical symbol. [3] (b) Chlorine gas, salt water and sodium chloride all contain chlorine. Draw lines from these substances to the correct type of substance. 4
5 [3] 22. Solids can change state to become gases. Look at the diagram to show the changes in state. Name the common factor in processes A and B. Accept: increase in heat/ energy/ temperature [1] 23. Look at the information about different atoms. Use the information above to answer the following questions. Which two atoms have 10 neutrons in their nuclei? Flourine and Neon [1] 24. Ernest Rutherford s work showed that [1] a. substances exist as atoms. b. atoms contain electrons. c. atoms have a nucleus. 5
![25. A nucleus with 86 protons and 126 neutrons undergoes alpha decay (breakdown). What does it form? [1] a.](/docs-images/77/75139957/images/6-2.jpg "A nucleus with 90 protons and 124 neutrons b. A nucleus with 84 protons and 124 neutrons c.")
![more than one). The first one is done for you. [9] A. Atom B. Molecule C. Compound D. Matter E. Substance F. Element G.](/docs-images/77/75139957/images/6-6.jpg "Organic H. Inorganic B, D, G, E Add [A, B, C, D, E, F, G, or H] to the pictures: A. Atom, B. Molecule, C. Compound, D.")
6 25. A nucleus with 86 protons and 126 neutrons undergoes alpha decay (breakdown). What does it form? [1] a. A nucleus with 90 protons and 124 neutrons b. A nucleus with 84 protons and 124 neutrons c. A nucleus with 82 protons and 128 neutrons 26. What do we call atoms with the same atomic number but different mass numbers? [1] a. Ions b. Isotopes 27. Most of the volume of an atom is occupied by [1] a. the nucleus b. nuclides c. empty space or the electron cloud d. protons 28. Choosing from the following list of words, assign the appropriate labels [A, B, C, D, E, F, G, or H] to the Figure (can be more than one). The first one is done for you. [9] A. Atom B. Molecule C. Compound D. Matter E. Substance F. Element G. Organic H. Inorganic B, D, G, E Add [A, B, C, D, E, F, G, or H] to the pictures: A. Atom, B. Molecule, C. Compound, D. Matter, E. Substance, F. Element, G. Organic, H. Inorganic D, B, [C, E, G] D, A, F, [G] D, B, [C, E, H] +1[1.5] +2[0.5] +1[1.5] See next page 6
7 Continued from previous page 29. Determine the mass of each reactant needed to give the indicated amount of product. Be sure that the chemical equations are balanced. [9] Reactants Products Pb(s) + PbO 2 (s) + 2H 2 (aq) 2Pb (s) + 2H 2 O(l); 3.8 g of Pb 3.8g Pb 1 mole PbSO g Pb = moles Pb Mass of Pb (reactant): moles Pb 1 mole Pb 207.2g Pb 2 moles Pb 1 mole Pb = 1.35 g Pb Mass of PbO 2 (reactant): moles Pb 1 mole PbO g PbO 2 2 moles Pb 1 mole PbO 2 Mass of H 2 (reactant): = 1.55g PbO moles Pb 2 mole H g H 2 2 moles Pb 1 mole H 2 Mass of water H 2 O (product): = 1.28g H moles Pb 2 mole H 2 O 18.02g H 2 O = 0.23g H 2 O 2 moles Pb 1 mole H 2 O 1.35 g Pb g PbO g H 2 = 3.8 g Pb g H 2 O 4.18 g of reactants = 4.03 g of product (0.15 g margin of error?) Mass of reactants = Mass of Products Law of conservation of Mass 7
8 30. Chlorine dioxide (ClO₂) is a bleaching agent used in the paper industry. It can be prepared by the following reaction: [6] 2NaClO 2 (s) + Cl 2 (g) 2ClO 2 (aq) + 2NaCl(aq) a. What mass of chlorine is needed for the complete reaction of 30.5 g of NaClO 2? 30.5 g NaClO 2 1 mole NaClO g NaClO 2 Mass of chlorine Cl 2 (reactant): = 0.34 moles NaClO moles NaClO 2 1 mole Cl g Cl 2 2 mole NaClO 2 1 mole Cl 2 = g Cl 2 b. Give a general equation for the conversion of x grams of sodium chlorite to chlorine dioxide. x g NaClO 2 1 mole NaClO 2 x g NaClO 2 = Mass of chlorine dioxide ClO₂ (reactant): moles NaClO 2 x 2 mole ClO₂ moles NaClO g ClO₂ = x mole NaClO 2 1 mole ClO₂ g ClO₂ 16. The figure below models a famous discovery in the history of the atom. In a few sentences describe the figure and its significance. Be sure to include: electrons Alpha particles a. What was this discovery b. Who made this discovery c. What was the experiment d. What was the expected result and the observed result e. And Label the figure. Concentration of positive charge [6] Rutherford's scattering experiment: A scientist called Ernest Rutherford designed an experiment to test the plum pudding model. A beam of alpha particles was aimed at very thin gold foil and their passage through the foil detected. The scientists expected the alpha particles to pass straight through the foil, but some of the alpha particles emerged from the foil at different angles, and some even came straight back. The scientists realised that the positively charged alpha particles were being repelled [repel: Push apart] and deflected [deflect: To cause an object to change direction. The object is 'deflected'.] by a tiny concentration of positive charge in the atom. As a result of this experiment, the plum pudding model was replaced by the nuclear model of the atom. 8
9 Crossword Key Questions 1-15: Bonus: Describe the exercise done in class with the objects shown here. Name six skills that were used in the exercise. Describe the relationship to the scientific method. a. Learning outcomes i. Skills used: discussion, developing an argument, observation, negotiation and teamwork ii. Scientists generate scientific theories based on evidence, but they do not find definitive answers. iii. Scientific knowledge and ideas change over time and are open to further revision as our understanding of the world around us evolves. Science is a social and creative activity. +10 Bonus: +10 DNA is composed of Nucleic acids that basepair together. The monomers of nucleic acids, called nucleotides, are formed from these units: A phosphoric acid molecule, H 3 PO 4 ; A five-carbon sugar; One of 4 nitrogen-containing organic bases: Adenine: C 5 H 5 N 5 Guanine: C 5 H 5 N 5 O Cytosine: C 4 H 5 N 3 O Thymine: C 5 H 5 N 2 O 2 Phosphate: PO 4 2-deoxyribose: C 5 H 9 O 4 Calculate the average atomic weight of a DNA basepair: calculated amu Average weight of a DNA basepair (sodium salt) = 650 daltons (amu or u) If the human genome is 3.3 x 10 9 basepairs long, what is the mass of the human genome in grams? Molecular weight of a double-stranded DNA molecule = (# of basepairs x 650 daltons) Total weight of the human genome = 3.3 x 10 9 bp x 650Da = Da. One Dalton is 1.67 x grams, so the human genome weighs 3.59 x grams (10-12 grams is also known as a picogram) 9
Directed 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.
Section Review. Development of the Atomic Theory USING VOCABULARY UNDERSTANDING CONCEPTS. Skills Worksheet
Skills Worksheet Section Review Development of the Atomic Theory USING VOCABULARY 1. In your own words, write a definition for the term atom. Correct each statement by replacing the underlined term. 2.
Chapter 2 Atoms and Elements
Chapter 2 Atoms and Elements Law of Conservation of Mass in a chemical reaction, matter is neither created nor destroyed total mass of the materials you have before the reaction must equal the total mass
Early 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
1 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
a. 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
Name... Class... Date... In this activity you will have an opportunity to explore the nuclear model of the atom by building your own.
Model of an atom Specification references: C1.1.4 Relative electrical charges of subatomic particles C1.1.5 Size and mass of atoms WS 1.2 Aims In this activity you will have an opportunity to explore the
Memorial 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
The 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
Name Chemistry-PAP Per. Notes: Atomic Structure
Name Chemistry-PAP Per. I. Historical Development of the Atomic Model Ancient Greek Model Notes: Atomic Structure Democritus (460-370 BC) was an ancient Greek philosopher credited with the first particle
Unit 2: Essentials of Chemistry Homework Packet (80 points)
Name: KEY Period: By the end of Unit 2, you should be able to: Essentials of Chemistry Chapter 1-2 & 4-5 Unit 2: Essentials of Chemistry 8. Explain the nature of science including the use of the validity
The 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
Chapter 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
Elements and Compounds. Composition of Matter
Elements and Compounds Composition of Matter Elements Element Identification Source of Light Elements Solar Spectra Detecting Elements Molecular Spectrum of CO Chemical and Physical Properties Elements
Work hard. Be nice. Name: Period: Date: UNIT 2: Atomic Concepts Lesson 3: Some go through and some don t
Name: Period: Date: UNIT 2: Atomic Concepts Lesson 3: Some go through and some don t Do Now: By the end of today, you will have an answer to: How did the gold foil experiment lead to the modern model of
Title: 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
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
Name 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
Accelerated 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
Chapter 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
Atomic 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
tomic 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
A1: Atomic Structure Worksheet (Goals 1 3, Chapter 4)
Unit 3 Assignment Packet Name: Period: A1: Atomic Structure Worksheet (Goals 1 3, Chapter 4) 1. Democritus, who lived in Greece during the 4 th century B.C., suggested that is made up of tiny particles
Chemistry Chapter 3. Atoms: The Building Blocks of Matter
Chemistry Chapter 3 Atoms: The Building Blocks of Matter I. From Philosophical Idea to Scientific Theory History of the Atom The Ancient Greeks were the first to come up with the idea of the atom. Democritus
History 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
ATOMIC 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
Where it came from and what we know now
Where it came from and what we know now History of the Atom The first mention of the atom came from Democritus in ancient Greece He suggested that the universe was made up of small, indivisible units called
Chapter 4 (part 1) Chemical Foundations: Elements, Atoms, and Ions. Copyright Cengage Learning. All rights reserved 1
Chapter 4 (part 1) Chemical Foundations: Elements, Atoms, and Ions Copyright Cengage Learning. All rights reserved 1 Section 4.1 The Elements 118 known: 88 found in nature, others are made in laboratories.
Chapter 11 Study Questions Name: Class:
Chapter 11 Study Questions Name: Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. The discovery of which particle proved that the atom
Atomic 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
Chapter 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
Name: 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
CH4 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
THE MODERN VIEW OF ATOMIC STRUCTURE
44 CHAPTER 2 Atoms, Molecules, and Ions GO FIGURE What is the charge on the particles that form the beam? Experiment Interpretation Incoming a particles Beam of a particles Source of a particles Nucleus
Physical Science Midterm Review
Chapter 1: Science Skills, pages 2-25 1. What is science? Science is a system of knowledge and the methods you use to find that knowledge. 2. What is the relationship between science and technology? Science
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
Name Class Date. The statements below are false. For each statement, replace the underlined term to make a true statement.
Skills Worksheet Chapter Review USING KEY TERMS The statements below are false. For each statement, replace the underlined term to make a true statement. 1. Electrons have a positive charge. 2. All atoms
Democritus & 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
Atoms, Molecules, and Ions
Atoms, Molecules, and Ions Atomic Theory of Matter Postulates of Dalton s Atomic Theory All matter is composed of indivisible atoms. An atom is an extremely small particle of matter that retains its identity
Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 1 of 13
TEST NAME:Atoms, Elements, and the Periodic Table Unit Assessment (2016) TEST ID:36063 GRADE:06-08 SUBJECT:Life and Physical Sciences TEST CATEGORY: Common Assessment Atoms, Elements, and the Periodic
7.1 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
Year 10 Revision. Atomic Structure C minutes. 75 marks. Page 1 of 28
Year 0 Revision Atomic Structure C.-5 75 minutes 75 marks Page of 28 Q. A substance made of only one type of atom is called an element. The chemical symbols and positions of six elements in the periodic
4.1 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
All are made of atoms. The, your and even are made of atoms. Atoms are. One atom is only one of a meter wide!
Name: Atoms & The Periodic Table WHAT IS AN ATOM? What is an atom? All are made of atoms. The, your and even are made of atoms. Atoms are. One atom is only one of a meter wide! DEMOCRITIS The idea of an
Chapter 8 notes. 8.1 Matter. 8.1 objectives. Earth Chemistry
Chapter 8 notes Earth Chemistry 8.1 Matter 8.1 objectives Compare chemical properties and physical properties of matter. Describe the basic structure of an atom. Compare atomic number, mass number, and
HIGH SCHOOL SCIENCE. Physical Science 9: Atomic Structure
HIGH SCHOOL SCIENCE Physical Science 9: Atomic Structure WILLMAR PUBLIC SCHOOL 2013-2014 EDITION CHAPTER 9 Atomic Structure In this chapter you will: 1. Compare and contrast quarks, leptons, and bosons.
Notes:&&Unit&4:&Atomics& & & & & & & & & & & & & & & & &
Name: RegentsChemistry:Mr.Palermo Notes:Unit4:Atomics! www.mrpalermo.com Name: $ Key$Ideas$ Themodernmodeloftheatomhasevolvedoveralongperiodoftimethroughtheworkofmany scientists.(3.1a) Eachatomhasanucleus,withanoverallpositivecharge,surroundedbyoneormorenegatively
Unit Two Test Review. Click to get a new slide. Choose your answer, then click to see if you were correct.
Unit Two Test Review Click to get a new slide. Choose your answer, then click to see if you were correct. According to the law of definite proportions, any two samples of water, H2O, A. will be made up
4.1 Studying Atoms Ancient Greek Models of Atoms
Studying the structure of atoms is a little like studying wind. Because you cannot see air, you must use indirect evidence to tell the direction of the wind. Atoms pose a similar problem because they are
Particle 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
Exam 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
(a) (i) What is represented by... (ii) What is represented by... (2) (b) What is the symbol for lithium?... (1) (Total 3 marks)
1 The diagram shows the structure of a lithium atom. (a) (i) What is represented by... (ii) What is represented by... (b) What is the symbol for lithium?... (Total 3 marks) 2 (a) Balance these chemical
How 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
Multiple Choice Do Now!
Name: Period: Date: KIPP NYC College Prep General Chemistry Quarter 1: Let s Review Multiple Choice Do Now! 1. Which substance can be decomposed by chemical means? (1) Aluminum (2) Octane (3) Silicon (4)
An 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
Chapter 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
Early 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,
Name 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
Chapter 2. Conservation of Mass. Law of Definite Proportions. Group Activity. Draw you idea of what an atom looks like.
Group Activity Draw you idea of what an atom looks like. Chapter 2 Answer the following questions: How do you know what an atom looks like at the atomic level? How do scientists know what at atom looks
Chapter 1: 1.7, , 1.27, 1.31, 1.35, 1.39, *1.43, 1.55, 1.59, 1.65, *1.67, 1.69*
Announcements Chapter 1: 1.7, 1.8. 1.9, 1.27, 1.31, 1.35, 1.39, *1.43, 1.55, 1.59, 1.65, *1.67, 1.69* Chapter 2: 2.17, 2.19, 2.25, 2.46, 2.85, 2.89, *2.95, 2.99, 2.101, 2.103, *2.105* Chapter 3: *3.7,*
1 amu 1 amu 0 amu. Chapter 2 part 1.notebook September 16, Modern Atomic Theory
Chapter 2 The Atom Elements are the basic substances that make up all matter. An atom is the smallest particle of an element. Average atoms are 10 10 m in diameter. If you could put 6.02 x 10 23 p + and
Structure of matter I
Structure of matter I "Could anything at first sight seem more impractical than a body which is so small that its mass is an insignificant fraction of the mass of an atom of hydrogen?" J.J. Thomson, about
Atomic Nature of Matter
Objectives: Atomic Nature of Matter 1. Define the atom and parts of the atom 2. Define the properties of an atom; molecules, compounds; states of matter Atoms Atoms are the building blocks of matter. Matter
Unit 2 continued-chemical Foundations Atoms, Ions, &Elements
Unit 2 continuedchemical Foundations Atoms, Ions, &Elements The Elements Most abundant elements in/on Earth: Oxygen 49.2% Silicon25.7% Most abundant in the human body: Oxygen65.0% Carbon18.0 % Hydrogen10.0%
Unit 2. Chemical Foundations: Elements, Atoms, and Ions
Unit 2 Chemical Foundations: Elements, Atoms, and Ions Memorize the list of elements You will have a quiz on this list. All of the elements will be on the quiz! Elements in the Earth System (% mass in
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model Atomic Theory Timeline The atomic model has changed over time. For over two centuries, scientists have created different models of the atom.
PROGRESSION 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
Chapter 2. Atomic Structure
Atomic Structure Chapter 2 What particles compose the substances around us? When you use the term particle to explain the different properties of a solid, liquid or gas, you are referring to the simplest,
5. Measured quantities, such as length, mass, or time, can best be described as:
1. How many significant figures are there in the number 0.0006042? a. 7 b. 3 c. 8 d. 4 e. 0 2. The agreement of a particular value with the true value is called a. accuracy. b. error. c. precision. d.
Unit 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,
CHE 105 Exam 1 Spring 2016
CHE 105 Exam 1 Spring 2016 Your Name: Your ID: Question #: 1 Which one of the following states of matter does not take on the shape of its container? A. solid B. liquid C. gas Question #: 2 Which statement
Scientist wanted to understand how the atom looked. It was known that matter was neutral. It was known that matter had mass
Atom Models Scientist wanted to understand how the atom looked It was known that matter was neutral It was known that matter had mass They used these ideas to come up with their models, however science
Democritus 460 BC 370 BC. First scholar to suggest that atoms existed. Believed that atoms were indivisible and indestructible.
Democritus 460 BC 370 BC First scholar to suggest that atoms existed. Believed that atoms were indivisible and indestructible. Democritus 460 BC 370 BC Problems with theory: 1. Did not explain chemical
Democritus 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
Atomic Structure. ppst.com
Atomic Structure ppst.com Defining the Atom The Greek philosopher (460 B.C. 370 B.C.) was among the first to suggest the existence of atoms (from the Greek word ) He believed that atoms were and His ideas
Name Class Date. Section: Development of the Atomic Theory THE BEGINNING OF ATOMIC THEORY
Skills Worksheet Directed Reading A Section: Development of the Atomic Theory THE BEGINNING OF ATOMIC THEORY Write the letter of the correct answer in the space provided. 1. Around 440 BCE, who thought
Atomic 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
Chapter 2 Reading Guide AP Chemistry Date: Per:
Chapter 2 Reading Guide Name: AP Chemistry 2016-2017 Date: Per: This chapter is foundational to concepts in AP Chemistry curriculum in Big Ideas 1 and 3. These two big ideas discuss the building materials
ATOMIC STRUCTURE. Atoms are really small. Gold and Palladium Atoms
ATOMIC STRUCTURE Atoms are really small. Gold and Palladium Atoms Theory vs Model Models are diagrams or apparatuses used to simplify the description of a complicated idea John Dalton English scientist
Chap 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
1 st Semester Final Review Sheet (Chapters 2-7)
CP Chemistry Name: Period: 1 st Semester Final Review Sheet (Chapters 2-7) Matter (Chapter 2) 1. What is the definition of an element? 2. What is the definition of a compound? 3. What is the definition
Chapter 2. Atoms, Ions, and the Periodic Table. Chapter 2 Topics. 2.1 Dalton s s Atomic Theory. Evidence for Atoms. Evidence for Atoms
Chapter 2 Atoms, Ions, and the Periodic Table Chapter 2 Topics 1. Dalton s s Atomic Theory 2. Structure of the Atom 3. Ions 4. Atomic Mass 5. The Periodic Table Copyright The McGraw-Hill Companies, Inc.
Solid Gas Liquid Plasma
Unit 1: MATTER 1. Define CHEMISTRY: 2. Define MATTER: Use one of the states of matter to complete each statement. (Words will be used more than once.) Solid Gas Liquid Plasma 3. A has definite volume and
Chapter #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
CHAPTER 2 Building Blocks of Materials
CHAPTER 2 Building Blocks of Materials Matter is everything that is around us that we interact with anything that occupies space and has mass. A classification scheme that you have likely seen. Chapter
Chapter 4. Atomic Structure
Chapter 4 Atomic Structure Warm Up We have not yet discussed this material, but what do you know already?? What is an atom? What are electron, neutrons, and protons? Draw a picture of an atom from what
CHE-1A Practice Midterm #1 Name. 1. (10 pts.) Write chemical formulas for each of the following compounds.
1. (10 pts.) Write chemical formulas for each of the following compounds. a.) ammonium phosphate b.) aluminum hydrogen sulfite c.) acetic acid d.) sodium bicarbonate e.) mercury (II) chloride 2. (10 pts.)
In 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
Card 1 Chapter 18. Card 2. Chapter 18. Negative particles that surround the nucleus (like planets around the sun)
Card 1 Card 2 Positive particles in the nucleus of the atom Negative particles that surround the nucleus (like planets around the sun) Card 3 Card 4 Neutral particles in the nucleus of the atom. They help
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
Atomic 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
What 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
Bi β + Po Bismuth-214 is radioactive. It has a half-life of 20 minutes. (a) The nuclide notation for bismuth-214 is Bi.
1 Bismuth-214 is radioactive. It has a half-life of 20 minutes. (a) The nuclide notation for bismuth-214 is Bi. State the composition of the nucleus of bismuth-214. [2] (b) Bismuth-214 decays by β-decay
9/13/2011. The Greek Philosophers. Atomic Structure & The Periodic Table. Dalton s Atomic Theory. J. J. Thomson. Thomson s Experiment
Atomic Structure & The Periodic Table The Greek Philosophers Democritus believed that all matter is made up of tiny particles that could not be divided Aristotle -- thought that matter was made of only
Atoms And The Periodic Table
Tick one box to choose the correct answer 1) What elements are found in the compound water (H 2 O)? Hydrogen and oxygen Helium and oxygen Hydrogen and nitrogen 2) Which of the following is a metal element?
General Chemistry I, Unit I: Study Guide
General Chemistry I, Unit I: Study Guide General Chemistry I Unit I 1 CDS Chapter 1: Atomic Molecular Theory Law of Conservation of Mass the total mass of all products of a chemical reaction is equal to
2. Which is NOT considered matter? (A) air (B) lead (C) sugar (D) sunlight. 4. Which of the following is a metalloid? (A) Se (B) Sr (C) Si (D) Sn
Midterm Review Packet ANSWER KEY 01/26/2014 Multiple Choice Question 1. Which part of an atom is positively charged? (A) proton (B) neutron (C) electron (D) shells 2. Which is NOT considered matter? (A)
Early Atomic Theory. Alchemy. The atom
Early Atomic Theory Chapter 3 Democritus 460 BC- ~ 370 BC Nothing exists except atoms and empty space; everything else is opinion. Matter is composed of small indivisible particles, atomos meaning Indivisible
The 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,
Ancient Greek Models of Atoms
Atomic Theory Ancient Greek Models of Atoms The philosopher Democritus believed that all matter consisted of extremely small particles that could not be divided. He called these particles atoms from the