History of Atomic Theory
|
|
|
- Olivia Taylor
- 5 years ago
- Views:
Transcription
1 Unit 2 The Atom
2 History of Atomic Theory A. Democritus and Aristotle Democritus named the "atom" - means indivisible
3 Dalton (with work of Lavoisier, Proust, and Gay-Lussac) 1. atomic theory - first based on evidence a. all matter is composed of atoms b. all atoms are alike in a particular element c. atoms combine in simple whole number ratios to form compounds
4 Atomic theory is based on three laws a. law of conservation of mass - matter cannot be created or destroyed b. law of definite proportions - compounds have same mass ratio of elements c. law of multiple proportions - compounds have same whole number ratio of elements Cr 2 O 3 CrO 3
5 John Dalton s Atom Atoms are solid and indivisible.
6 Atomic Particles Thomson - discovered the electron, mass of proton, plum pudding model (particles mixed) Millikan - discovered the electron s charge to mass ratio. Chadwick - discovered the neutron
7 Components of the Atom Electrons J.J. Thomson found in 1897 Particles deflected in Cathode Ray tube Negative one charge Very small mass 1/2000 that of the lightest atom
8 J. J. Thomson s Atom Thompson hypothesized that all atoms had such negative charges within. (plum pudding model) Later, scientists proved that atoms contained both positive and negative charges (which balance each other out).
9 Ernest Rutherford 1911 Gold Foil Experiment using alpha particles Found the nucleus is positively charged and contains most of the atom s mass. Thought the rest of the atom was mostly empty space.
10 Bohr Studied relationships between energy, wavelength, and frequency Used Rutherford s discovery of the nucleus Developed the planetary orbit model of the atom
11 Niels Bohr s Atom Electrons orbit the nucleus in orbits, like a solar system. Planetary Model
12 The Atom Atomic Theory
13 Parts of the atom A. proton p +, neutron n o and electron e - B. Terms 1. atomic number (Z) = number of protons (identity) 2. # electrons = number of protons 3. mass number = # protons plus # neutrons (A) 4. # neutrons = mass # - atomic #
14 Isotopes 1. atoms with the same atomic number (Z), but different mass number (A); they have different number of neutrons 2. mass number is written after the element name, i.e. carbon nuclear symbols put mass number on top, atomic number on bottom out to the left of the chemical symbol Examples: carbon (see board)
15 Atomic Mass 1. based on carbon-12 having 12 atomic mass units (a.m.u.) 2. average atomic mass is a weighted average of all isotopes Steps to calculate: 1. multiply relative abundance and average mass for each isotope (to correct sig figs). 2. add together (to least accurate decimal place) to get average atomic mass for the element.
16 Example: What is the atomic mass of silicon if 92.21% is mass , 4.70% is mass , and 3.09% is mass ? (.9221)( amu) = (.0470)( amu) = 1.36 (.0309)( amu) = Add together for average atomic mass
17 The Atom Using the Mole
18 Scientific Notation Expressed as product of number and power of 10; such as 3.5 x 10 3 cm Removes doubt about significant figures - all numbers are significant. Conversion: Only one nonzero number in front of the decimal. Find the power of power of 10 for each space moved to the left -1 power of 10 for each space moved to the right Follow normal rules about sig figs to determine how many in answer. Use exponent key on calculator (EE or EXP) to REPLACE the x 10 part of number (4.2 x 10 2 cm)(3.0 x 10-5 cm) = Put in: 4.2 EXP 2 x 3.0 EXP -5 (or EE) (or EE)
19 Formula and Molecular Mass Sum of atomic masses of all atoms in a compound Steps to calculate: 1. write the number of atoms of each element present in the formula 2. find mass of each element on table 3. multiply these two together to get total mass of each element in compound 4. add masses together to least accurate decimal place Example: (see board)
20 The Mole A mole is always the same number of items just like a dozen is always twelve but the number is HUGE! Avogadro s number is the number of particles in a mole. It is x This helps us count the number of particles by weighing. The mass of one mole of particles is equal to its atomic or formula mass in grams. So 3 Equivalents: x particles = 1 mol = # g from table (Use as converting ratios put in the units before any numbers! )
21 Mole Examples 1. g to moles: How many moles are there in 50.4 g Ca? 50.4 g Ca 1 mol Ca = 1.26 mol Ca 40.08g Ca 2. particles to moles: How many moles of NaCl are there if there are 5.68 x formula units? 5.68 x formula units 1 mol NaCl x formula units = 9.43 x 10-6 mol NaCl 3. g to particles: How many molecules of H 2 O in 42.3 g of water? 42.3g H 2 O x molecules g H 2 O = 1.41 x molecules H 2 O
22 End of Unit 2
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
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,
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
AP Atomic Structure Models
AP Atomic Structure Models What is a Model? On a scrap piece of paper, write down your definition of a model with at least two examples. A model is a representation of an object, idea, action, or concept.
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
History of the OBJECTIVES. ESSENTIAL QUESTION What evidence is there for the existence of atoms and their sub-atomic particles?
History of the 09/15/2016 OBJECTIVES Understand the law of definite proportions. Define a scientific law and identify how observations become a law. Explain that a scientific theory is not established
Dalton 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
Name 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
ATOM. 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
CHAPTER 3. Atoms: The Building Blocks of Matter
CHAPTER 3 Atoms: The Building Blocks of Matter Origins of the Atom Democritus: Greek philosopher (460 BC - 370 BC) Coined the term atom from the Greek word atomos Democritus believes that atoms were indivisible
Atomic Theory. Past and Present: pieces of a puzzle
Atomic Theory Past and Present: pieces of a puzzle The First Atomic Hypothesis Democritus (460 370 BC): Greek philosopher Speculated that matter is composed of atoms which move through empty space Atoms
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
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
CHAPTER 4: Matter is Made up of Atoms
CHAPTER 4: Matter is Made up of Atoms ATOMS & THEIR STRUCTURE Aristotle thought matter was made of air, earth, fire and water. Democritus (250 B.C.)- Said the world is made of empty space & tiny particles
9/23/2012. 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
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,
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
Get 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
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
Atoms and their structure
Atoms and their structure History of atomic theory Not the history of atom, but the idea of the atom Original idea Ancient Greece (400 B.C..) Democritus and Leucippus Greek philosophers Another Greek Aristotle
Nuclear 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,
Atomic Structure. How do you discover and study something you can t see?
Atomic Structure How do you discover and study something you can t see? WHAT IS A THEORY? A hypothesis is a proposed explanation made as a starting point for further investigation (It s bright outside
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
Chapter 3 Atoms: The Building Blocks of Matter. Honors Chemistry 412
Chapter 3 Atoms: The Building Blocks of Matter Honors Chemistry 412 Foundations of Atomic Theory Democritus Greek Philosopher 460-370 B.C. Stated Matter could be divided into smaller & smaller particles
Democritus thought atoms were indivisible & indestructible Lacked experimental support 4 th century B.C.
Chapter 5 Democritus thought atoms were indivisible & indestructible Lacked experimental support 4 th century B.C. Democritus thought atoms were indivisible & indestructible Lacked experimental support
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
NOTES 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,
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
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
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
Chemistry. Robert Taggart
Chemistry Robert Taggart Table of Contents To the Student..................................................v Unit 1: Matter and Measurement Lesson 1: Chemistry and the Scientific Method...................3
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
Chemistry 11 Early models of the atom 1. Structure of the Atom
Chemistry 11 Early models of the atom 1 Structure of the Atom Democritus Developed the idea of atom Thought things were made of atoms that have different Shapes Aristotle Matter is made of different amounts
SNC1D1 History of the Atom
SNC1D1 History of the Atom What is the atom? Atoms are the building block for all matter: Atoms make up elements! Elements combine to make compounds!2 ATOMIC MODEL TIMELINE 400 B.C PRESENT DAY ATOMIC MODEL
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
Atomic Structure. 1. Democritus 2. Dalton 3. Thompson 4. Millikan 5. Moseley 6. Bohr 7. Rutherford 8. Schrodinger. October 03, 2014.
October 03, 2014 Atomic Structure Chapter 4 Democritus's Atomic Philosophy 1. Democritus 2. Dalton 3. Thompson 4. Millikan 5. Moseley 6. Bohr 7. Rutherford 8. Schrodinger Aristotle -Rejected the idea of
Atoms: The Building Blocks of Matter CHAPTER 3
Atoms: The Building Blocks of Matter CHAPTER 3 The Early Greek View Democritus: 400 BC World was made up of two things: Empty Space Tiny particles called atoms. Atoms were the smallest possible particle.
BEGINNING OF ATOMIC THEORY
Skills Worksheet Directed Reading B Section: Development of the Atomic Theory THE BEGINNING OF ATOMIC THEORY 1. What does the word atom mean? a. dividable b. invisible c. hard particles d. not able to
Unit 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
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: 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
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
EARLY 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
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
Chapter 4 Atomic Structure. Chemistry- Lookabaugh Moore High School
Chapter 4 Atomic Structure Chemistry- Lookabaugh Moore High School Section 4.1 Defining the Atom Democritus (460 B.C 370 B.C.) first used the term atomon to describe the smallest particle of matter possible.
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
The following is a quote by Democritus (c. 460 c. 370 bce). Paraphrase this quote in your own words in your science journal.
Section 1 Development of the Atomic Theory Bellringer The following is a quote by Democritus (c. 460 c. 370 bce). Paraphrase this quote in your own words in your science journal. Color exists by convention,
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
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
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
Atomic 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.
Early Atomic Theories and the Origins of Quantum Theory. Chapter 3.1
Early Atomic Theories and the Origins of Quantum Theory Chapter 3.1 What is Matter Made of? People have wondered about the answer to this question for thousands of years Philosophers Matter is composed
Origins of the Atom. Atoms: The Building Blocks of Matter. Let s Get Ready to Rumble. Aristotle s Theory of the Atom CHAPTER 3
Origins of the Atom CHAPTER 3 Atoms: The Building Blocks of Matter Let s Get Ready to Rumble The idea of the atom was met with great skepticism, especially among great thinkers. The most vocal critic of
4-1 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
CHAPTER 4: THE ATOM PHYSICAL SCIENCE
CHAPTER 4: THE ATOM PHYSICAL SCIENCE By C. Goodman, Doral Academy Preparatory High School, 2011-2013 Based on a PowerPoint presentation by Mrs. S. Temple, Doral Academy Preparatory High School Essential
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 #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
DEMOCRITUS - A philosopher in the year 400 B.C. - He didn t do experiments and he wondered if atoms kept on being divided, that there would only be
DEMOCRITUS A philosopher in the year 400 B.C. He didn t do experiments and he wondered if atoms kept on being divided, that there would only be one undividable particle left. He discovered that this was
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
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
Glencoe: Chapter 4. The Structure of the Atom
Glencoe: Chapter 4 The Structure of the Atom Section One: Early Ideas about Matter Atomists and Democritus : 400 B.C. From Thrace in Greece. Atoms- Uncut-Table Indivisible parts which cannot be broken
The Development of Atomic Theory
The Development of Atomic Theory Democritus (400 BC) John Dalton (1803) J.J. Thomson (1897) Ernest Rutherford (1911) James Chadwick (1932) - suggested that matter is composed of indivisible particles called
Atomic Theory. Developing the Nuclear Model of the Atom. Saturday, January 20, 18
Atomic Theory Developing the Nuclear Model of the Atom Democritus Theory: Atom, the indivisible particle c. 300 BC Democritus Problem: No scientific evidence c. 300 BC Dalton Theory: The solid sphere model
Time to develop a model
ATOMIC THEORY ONCE UPON A TIME People have been fascinated with matter for a long time. What is matter? What is all this stuff around us made of? Can it be broken down? Are there different types of matter?
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,
CHAPTER 3 THE ATOM. 1. Matter is composed extremely small particles called atoms
CHAPTER 3 THE ATOM Read pgs. 107-110 I. History Democritus Greek philosopher, 400 B.C., said all matter is made up of small, indivisible particles he called atoms (Greek for indivisible ). He wasn t believed
Honors Chemistry Unit 2: The Atom & Its Nucleus
Honors Chemistry Unit 2: The Atom & Its Nucleus (2017-2018) Bunsen, I must tell you how excellent your study of chemical spectroscopy is, as is your pioneer work in photochemistry but what really impresses
What is matter? Matter is anything that has mass and takes up space. Matter is made up of atoms.
Matter What is matter? Matter is anything that has mass and takes up space. Matter is made up of atoms. Is it matter? Can you measure the object? Does it take up space? Does the object have a mass? Come
Chapter 4. The structure of the atom. AL-COS Objectives 1, 2,3,4,7, 10, 15, 20, 21, 22, 27and 28
Chapter 4 The structure of the atom AL-COS Objectives 1, 2,3,4,7, 10, 15, 20, 21, 22, 27and 28 You ll learn to Identify the experiments that led to the development of the nuclear model of atomic structure
Chapter 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
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 3 and 4 review. 1. List the types of electromagnetic radiation in order from smallest to highest wavelength:
Chapter 3 and 4 review Name 1. List the types of electromagnetic radiation in order from smallest to highest wavelength: 2. When placed in the above order, is the frequency increasing or decreasing? 3.
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
An Introduction to Atomic Theory. VCE Chemistry Unit 1: The Big Ideas of Chemistry Area of Study 1 The Periodic Table
An Introduction to Atomic Theory VCE Chemistry Unit 1: The Big Ideas of Chemistry Area of Study 1 The Periodic Table From Democritus to Dalton Two thousand years ago, Democritus proposed that matter consisted
Smoking at an early age may make it more difficult to quit smoking later. Which of the above statements is an opinion and which is a theory?
Preview Lesson Starter Objectives Foundations of Atomic Theory Law of Conservation of Mass Law of Multiple Proportions Dalton s Atomic Theory Modern Atomic Theory Section 1 The Atom: From Philosophical
5 Early Atomic Theory and Structure
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
The Development of Atomic Theory
The Development of Atomic Theory Ideas & Theories in Science Change Our theory about the atom has changed over time as new studies are done. Even though no one has ever seen an atom up close we are still
Chapter Two: Early History of Chemistry. Three Important Laws. Dalton s Atomic Theory (1808) Three Important Laws (continued) Greek Explanation
Greek Explanation Chapter Two: ATOMS, MOLECULES, AND IONS Notes 2.1 In the Greek model they theorized there were four elements earth, water, air, and fire. These elements were characterized by the following
Fill in the Following Table in your notes (assume an atom unless otherwise stated: Symbol Protons Electrons Neutrons Atomic # Mass # 24 Na
Bellwork: Fill in the Following Table in your notes (assume an atom unless otherwise stated: Symbol Protons Electrons Neutrons Atomic # Mass # 24 Na + 11 29 63 Bellwork: Fill in the Following Table in
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.
Regents 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
Chemistry. - Many philosophers concluded that matter was composed of things such as earth, -Democritus: -Aristotle: -Dalton:
Chemistry Made by Saleem Abu-Tayeh Chapter 4 - Many philosophers concluded that matter was composed of things such as earth, water, air, and fire. It was also commonly accepted that matter could be endlessly
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
Chapter 4 Jeopardy Review
Chapter 4 Jeopardy Review Atom Models of the Atom Atomic Theory Calculating Subatomic Particles Isotopes 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500
Vocabulary Review. Atom Cathode Ray Electrons Protons Neutrons Nucleus
2/19/16 Do Now On your half sheet of paper, identify the scientist that either discovered a part of the atom or developed a theory related to atomic structure. Vocabulary Review Atom Cathode Ray Electrons
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.
Atomic Theory. Early models
Atomic Theory Early models Ancient Greece Late 18 th century 4 elements Earth, Water, Wind, Fire: Matter is made up in different combinations of these 4 elements. First atom proposed by Democritus (Greek)
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
Ch. 4 Notes THE STRUCTURE OF THE ATOM NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics.
Ch. 4 Notes THE STRUCTURE OF THE ATOM NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics. I. Early Ideas About Matter A. atom the smallest particle of an element retaining
Chapter 4 The Atom. Philosophers and scientists have proposed many ideas on the structure of atoms.
Chapter4 TheAtom 4.1 Early Models of the Atom An atom is the smallest particle of an element that retains its identity in a chemical reaction. Philosophers and scientists have proposed many ideas on the
JJ Thompson (1897) Robert Millikan (1909)
Atomic Structure Matter Consists of Particles Aristotle Democritus John Dalton 183 I am a genius! Atomic Theory of Matter based on the following postulates: 1) Each element is composed of particles called
Section 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
Chem 1075 Chapter 5 Models of the Atom Lecture Outline
Chem 1075 Chapter 5 Models of the Atom Lecture Outline Slide 2 Dalton Model of the Atom John Dalton proposed that is made up of The particles are or can be broken down into by chemical processes. cannot
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
DescribeDemocritus s Democritus s ideas
Atomic Structure Section 4.1 Defining the Atom DescribeDemocritus s Democritus s ideas about atoms. Section 4.1 Defining the Atom Explain Dalton s atomic theory. Section 4.1 Defining the Atom Identifywhat
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
8.5 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
Atomic 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
H CHEM - WED, 9/7/16. Do Now Be ready for notes. Sigfig review problem. Agenda Atomic Theory. Homework. Error Analysis
H CHEM - WED, 9/7/16 Do Now Be ready for notes. Sigfig review problem Agenda Atomic Theory Error Analysis Homework Possibly atomic theory paragraph THE ATOM DEFINITION TO START Atom smallest particle
Notes:&&Unit&4:&Atomics& & & & & & & & & & & & & & & & &
Name: RegentsChemistry:Mr.Palermo Notes:Unit4:Atomics! www.mrpalermo.com Name: $ Key$Ideas$ Themodernmodeloftheatomhasevolvedoveralongperiodoftimethroughtheworkofmany scientists.(3.1a) Eachatomhasanucleus,withanoverallpositivecharge,surroundedbyoneormorenegatively