Winmeen Tnpsc Group 1 & 2 Study Materials
|
|
|
- Janel Gilmore
- 5 years ago
- Views:
Transcription
1 23. Atomic Structure 1. What is atom? Atoms are the building blocks of all matter. Atoms are extremely small in size and are expressed in terms of m (1 A ) 2. What is atom in Greek language? In Greek language, atom means 'incapability of being cut'. 3. What are the laws of chemical combination? Law of Conservation of Mass Law of Definite Proportion Law of Reciprocal Proportion Law of Multiple Proportion and Gay Lussac s Law of Combining Volume 4. What is law of definite proportion? The Law of Definite Proportions can be stated as. "A pure chemical compound prepared by any method consists of the same elements combined together in a fixed proportion by mass". 1 Learning Leads to Ruling
2 5. What is law of conservation of mass? The Law of Conservation of Mass can be stated thus: Mass can neither be created nor destroyed during a physical or a chemical change. 6. What was Dalton`s atomic theory based on? Matter is made up of small, indivisible particles called atoms. Atoms can neither be created nor destroyed. Atoms of the same element are identical in all respects. Atoms of different elements are different in all respects. Atoms of different elements may combine with each other in a fixed simple whole number ratio to form compound atoms (or molecules). The atom is the smallest particle of matter that takes part in a chemical reaction. 7. What is atomic electricity? The first direct experimental evidence to prove the electrical nature of matter came from Michael Faraday. He demonstrated through his experiments that electricity is composed of particles called atoms of electricity. 8. Who proposed concept on electron? 2 Learning Leads to Ruling
3 It was George Johnstone Stoney, an Irish Physicist, who first proposed the term electron for atom of electricity in 1891.His contribution to research in this area laid the foundations for the eventual discovery of particles by J.J. Thomson in Who found visible rays travelling between two electrodes? In 1878, Sir William Crookes, while conducting an experiment using a discharge tube, found certain visible rays travelling between two metal electrodes. These rays are known as Crooke s Rays or Cathode Rays. 10. What is CRT? The discharge tube used in the experiment is now referred to as Crookes tube or more popularly as Cathode Ray Tube (CRT). 11. What is negative electrode? The electrode which is connected to the negative terminal of the battery is called the cathode (negative electrode). 12. What is positive electrode? The electrode connected to the positive terminal is called the anode (positive electrode). 3 Learning Leads to Ruling
4 13. What is florescent material? When invisible radiation falls on materials like zinc sulphide, they emit a visible light (or glow). This is called fluorescent material. 14. What are the properties of Cathode rays? Cathode rays travel in straight lines parallel to each other Cathode rays are made up of small particles that have mass and kinetic energy. Cathode rays are negatively charged particles The direction of deflection indicates that the cathode rays consist of negatively charged particles. These negatively charged particles are called electrons. The nature of the cathode rays does not depend on the nature of the gas filled inside the tube or the cathode used. 15. What was the concept of Goldstein? The presence of positively charged particles in the atom has been precisely predicted by Goldstein based on the conception that the atom being electrically neutral in nature, should necessarily possess positively charged particles to balance the negatively charged electrons. 4 Learning Leads to Ruling
5 16. What is protons? When hydrogen gas was taken in a discharge tube, the positively charged particles obtained from the hydrogen gas were called PROTONS. 17. What are the properties of Anode Rays? 1. Anode rays travel in straight lines. 2. Since they rotate the light paddle wheel placed in their path, they consist of material particles. 3. Anode rays are deflected by electric and magnetic fields. Since they are deflected towards the negatively charged plate, they consist of positively charged particles. 4. The properties of anode rays depend upon the nature of gas taken in the discharge tube. 5. The mass of the particle is the same as the atomic mass of the gas inside the discharge tube. 18. What is compared to Thomson atomic model? Thomson s Atomic Model can be compared to a watermelon or a ripened guava. The red edible portion of the watermelon represents the positive sphere. The black 5 Learning Leads to Ruling
6 seeds look like the electrons embedded in an atom. Thomson s scientific model of the atom is popularly known as the 'plum pudding' model. 19. What are the findings of Thomson on atom? 1. An atom consists of a positively charged sphere with electrons embedded in it. 2. The positive and negative charges are equal in magnitude; hence the atom as a whole is electrically neutral. 6 Learning Leads to Ruling
Physics 30 Modern Physics Unit: Atomic Basics
Physics 30 Modern Physics Unit: Atomic Basics Models of the Atom The Greeks believed that if you kept dividing matter into smaller and smaller pieces, you would eventually come to a bit of matter that
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
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
CLASS 11th. Structure of Atom
CLASS 11th Structure of Atom 01. Introduction John Dalton 1808, believed that matter is made up of extremely minute indivisible particles, called atom which takes part in chemical reactions. These particle
Chapter 5. Early Atomic Theory and Structure
Chapter 5 Early Atomic Theory and Structure 1 5.1 Early thoughts ~ 400 B.C. Greek philosophers Empedocles all matter was composed of four elements earth, air, water, fire Democritus all forms of matter
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
1. Based on Dalton s evidence, circle the drawing that demonstrates Dalton s model.
Various models of the ATOM Dalton Model John Dalton developed the first atomic model in 1808. Before him people, mostly philosophers, had speculated about the smallest unit of matter and two theories prevailed.
Topic III Quest Study Guide
Topic III Quest Study Guide A. Early Concepts: Democritus: Democritus: Greek Philosopher 400 B.C. Matter is composed of atoms, which move through empty space Atoms are solid, homogeneous indestructible
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.
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
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
2.1 Evidence for the existence of the electron
2. The Atom 2.1 Evidence for the existence of the electron The universe consists of energy & matter. Matter occupies space and has mass. Law of conservation of mass states matter is neither created nor
The Nature of Matter Textbook Inside the Atom. 1) Explain how scientists discovered particles of an atom.
Models of the Atom The Nature of Matter Textbook Inside the Atom 1) Explain how scientists discovered particles of an atom. 2) Explain how today's model of the atom was developed. 3) Describe the structure
Updating the Atomic Theory
Updating the Atomic Theory On the basis of Dalton s Atomic Theory: An atom is the basic unit of an element that can enter into chemical combination. Three major differences between modern atomic theory
Updating the Atomic Theory
Updating the Atomic Theory Three major differences between modern atomic theory and Dalton s atomic theory 1. Atoms are NOT indivisible. They are made up of smaller particles: electrons, protons and neutrons.
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.
Models of the Atom The Nature of Matter Textbook Inside the Atom
Models of the Atom The Nature of Matter Textbook Inside the Atom 1) Explain how scientists discovered particles of an atom. 2) Explain how today's model of the atom was developed. 3) Describe the structure
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
What is matter? Matter is anything that has mass and takes up space. What is matter made of??
What is matter? Matter is anything that has mass and takes up space What is matter made of?? Atoms. All matter is made of atoms. Atoms are the building blocks of Matter Remember???? The Cell theory - 3
10/15/2010. First Thoughts. First Thoughts
0/5/200 First Thoughts First Thoughts People began wondering about matter more than 2,500 years ago. Some of the early philosophers thought that matter was composed of tiny particles. They reasoned that
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
Charge to mass Ratio. Nature of the Atom: Dalton's Contributions to Science. 6) qm ratio notes.notebook. December 13, 2018
Nature of the Atom: Charge to mass Ratio Studies of atoms from John Dalton's atmospheric studies indicated that properties were cyclic moving from group to group. This suggested some unit of atomic structure
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
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
Discovered by German scientist Johann Hittorf in 1869 and in 1876 named by Eugen Goldstein.
DO PHYSICS ONLINE CATHODE RAYS CATHODE RAYS (electron beams) Streams of electrons (negatively charged particles) observed in vacuum tubes - evacuated glass tubes that are equipped with at least two metal
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
Atom s Structure. Chemistry is the study of the structure, characteristics and behavior of matter. The basic
AlMarzooqi 1 Hamad AlMarzooqi Professor Kafle ESL 015 26 February 2013 Atom s Structure Chemistry is the study of the structure, characteristics and behavior of matter. The basic unit of matter is an atom,
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
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
VISUAL PHYSICS ONLINE EARLY MODELS OF THE ATOM
VISUAL PHYSICS ONLINE EARLY MODELS OF THE ATOM The atom was believed to be smallest building block of matter and an indivisible unit, until the late 19 th century. There was no direct evidence that atoms
Chapter 1 The discovery of the electron 1.1 Thermionic emission of electrons
Chapter 1 The discovery of the electron 1.1 Thermionic emission of electrons Learning objectives: What are cathode rays and how were they discovered? Why does the gas in a discharge tube emit light of
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
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
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
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
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
The Structure of the Atom
Main Ideas Atoms contain positive and negative particles. Atoms have small, dense, positively-charged nuclei. A nucleus contains protons and neutrons. The radii of atoms are expressed in picometers. FIGURE
ELECTROMAGNETIC WAVES
VISUAL PHYSICS ONLINE MODULE 7 NATURE OF LIGHT ELECTROMAGNETIC WAVES SPECTRA PRODUCED BY DISCHARGE TUBES CATHODE RAYS (electron beams) Streams of electrons (negatively charged particles) observed in vacuum
Rhonda Alexander IC Science Robert E. Lee
Rhonda Alexander IC Science Robert E. Lee Atom The smallest particle of an element that retains all of the chemical properties of the element. The Theory & Evidence for John Dalton s Atomic Theory: Around
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
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
The Nature of Matter Textbook Inside the Atom. 1) Explain how scientists discovered particles of an atom.
Models of the Atom The Nature of Matter Textbook Inside the Atom 1) Explain how scientists discovered particles of an atom. 2) Explain how today's model of the atom was developed. 3) Describe the structure
Atomic Theory Timeline
Atomic Theory Timeline Democritus 450 B.C. Democritus was a Greek philosopher who came to the conclusion that everything was made up of tiny particles. He used the term atomos. Unfortunately, since Democritus
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
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
Ch 2: Atoms, Molecules, and Ions
AP Chemistry: Atoms, Molecules, and Ions Lecture Outline 2.1 The Atomic Theory of Matter Greek philosophers: Can matter be subdivided into fundamental particles? Democritus (460 370 BC): All matter can
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
2 Copyright Pearson Education, Inc., or its affiliates. All Rights Reserved.
CHEMISTRY & YOU Chapter 4 Atomic Structure 4.1 Defining the Atom 4.2 Structure of the Nuclear Atom How did scientists determine the structures that are inside an atom? X-rays are used to see structures
4.2 Structure of the Nuclear Atom > Chapter 4 Atomic Structure. 4.2 Structure of the Nuclear Atom. 4.1 Defining the Atom
Chapter 4 Atomic Structure 4.1 Defining the Atom 4.2 Structure of the Nuclear Atom 4.3 Distinguishing Among Atoms 1 CHEMISTRY & YOU How did scientists determine the structures that are inside an atom?
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
Chapter 1. Chemical Foundations
Chapter 1 Chemical Foundations Chapter 1 Table of Contents (1.1) (1.2) (1.3) (1.4) (1.5) (1.6) (1.7) Chemistry: An atoms-first approach The scientific method The early history of chemistry Fundamental
Chapter 38. The End of Classical Physics
Chapter 38. The End of Classical Physics Studies of the light emitted by gas discharge tubes helped bring classical physics to an end. Chapter Goal: To understand how scientists discovered the properties
Atomic Theory: Early Models of the Atom:
Atomic Theory: Our next job in Chemistry 11 is to learn about what matter is made of. After we have done this, we can start to understand why matter behaves the way it does. Everything that has volume
The Atom and the Subatomic Particles
The Atom and the Subatomic Particles The purpose of this handout is to familiarize the chemistry student with the history, development and structure of the atomic model. In the hope, that the student will
Do Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester?
Chemistry Ms. Ye Name Date Block Do Now: Recall 1. What is an atom? What have you learned about the word atom so far this semester? Atoms Video: 1. Proper Portioned Giant Atom Model of Science: Structure
HISTORY OF THE ATOM ATOMA
S.MORRIS 2006 HISTORY OF THE ATOM 460 BC Democritus develops the idea of atoms he pounded up materials in his pestle and mortar until he had reduced them to smaller and smaller particles which he called
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,
Who came up with the first theory of atoms?
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 units called
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
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
Democritus of Abdera. John Dalton. Dalton s Atom. Dalton s Atomic Theory Ancient Greece - 4th century BC. Eaglesfield, England
Democritus of Abdera Ancient Greece - 4th century BC first suggested the existence of tiny fundamental particles that make up matter. atoms = indestructible did not agree with the current sci theory -
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
Atomic Structure Subatomic Particles
In a power outage all your electrical equipment suddenly stops working. The radio was on just a minute ago and now it is silent. What happened? Somewhere between a power generator and your radio there
The Development of Atomic Theory. SCH12U February Mr. Dvorsky
The Development of Atomic Theory SCH12U February 3 2011 Mr. Dvorsky Nearly 2500 years ago Greek philosophers (i.e. Democritus) expressed a belief matter is composed of tiny indivisible particles called
Evolution of Atomic Theory
Evolution of Atomic Theory Mrs. Baldessari Chemistry Scientists that changed our view of the atom?greatest Chemistry Discoveries?? YouTube Aristotle What: All matter is a combo of fire, air, earth or water
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
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 Atomic Structure
CHAPTER 4 Atomic Structure 4.1 Early Theories of Matter Earth, Water, Air, Fire Matter was thought to be infinitely divisible No method was available to test theories Democritus (460 B.C. 370 B.C.) First
Passing an electric current makes a beam appear to move from the negative to the positive end.
Chapter 4 Atoms and their structure History of the atom Not the history of atom, but the idea of the atom. Original idea Ancient Greece (400 B.C.) Democritus and Leucippus Greek philosophers. Smallest
Greek Philosophers (cont.)
Greek Philosophers (cont.) Many ancient scholars believed matter was composed of such things as earth, water, air, and fire. Many believed matter could be endlessly divided into smaller and smaller pieces.
Chapter 5. Early Atomic Theory and Structure
Chapter 5 Early Atomic Theory and Structure Introduction to General, Organic, and Biochemistry 10e John Wiley & Sons, Inc Morris Hein, Scott Pattison, and Susan Arena Lightning occurs when electrons move
CHAPTER -4 STRUCTURE OF ATOM CONCEPT DETAILS
CHAPTER -4 STRUCTURE OF ATOM CONCEPT DETAILS KEY CONCEPTS : [ *rating as per the significance of concept] 1. Dalton s Atomic theory ** 2. J J Thomson Experiments *** 3. Rutherford s Scattering Experiments
Atomic Theory. Why do we believe that all matter is made of atoms?
Atomic Theory Why do we believe that all matter is made of atoms? 1. Law of definite composition: Compounds (like H 2 O) contain the same elements in the same proportions by mass regardless of the size
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
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
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
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
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
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
The Beginning of the Atom
The Beginning of the Atom Democritus s Atomic Philosophy 460BC 370BC ~ Believed atoms were indivisible and indestructible Dalton took it and ran with it 2000 yrs later! Jan 31 3:33 PM Dalton and the Atomic
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
3.1 Early History of Atomic Theories
Figure 1 In Dalton s atomic model, an atom is a solid sphere, similar to a billiard ball. This simple model is still used today to represent the arrangement of atoms in molecules. DID YOU KNOW? William
Who came up with the first theory of atoms?
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 units called
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
Atomic Structure. OBJECTIVES After completing this lesson, you should be able to:
3 Atomic Structure In the previous lesson, you have studied that the atoms are the smallest constituents of matter. But what is the structure of an atom? Why are atoms of different elements different?
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
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.
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.
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
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
General Chemistry Standard : Identify the significance of the various outcomes of Thomson s and Rutherford s experiments
Not the history of the atom, but the idea of the atom The atom was not discovered until recently Original Idea Ancient Greece (400 BC) Proposed by lesser-known scientists They looked at a beach made of
Where are we? Check-In
Where are we? Check-In ü Building Blocks of Matter ü Moles, molecules, grams, gases, ü The Bohr Model solutions, and percent composition Coulomb s Law ü Empirical and Molecular formulas Photoelectron Spectroscopy
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
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
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
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 2: The Atomic Nature of Matter Olmsted and Williams, 3 rd Edition
Chapter 2: The Atomic Nature of Matter Olmsted and Williams, 3 rd Edition HW: 5, 7, 10, 13, 15, 17, 19, 22, 23, 27, 30, 31, 35, 36, 41, 42, 59, 63, 69, 70 Atomic Theory and How It Came About Aristotle
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
What is the current atomic model?
4.1 Atoms Basic Units of Matter What is the current atomic model? Matter is anything that has mass and takes up space, such as gases, solids, and liquids. Matter is not sound, heat, or light these are