Atoms structures of, properties of, how they affect each other, history of Chapter 18.

Slides:

Advertisements

Similar presentations

Democritus Dalton 3. JJ Thomson 4. Rutherford 5. Bohr 6. Chadwick

Advertisements

A History of the Atom A long time to study a little thing.

Atomic Structure. What is an Atom? The smallest part of an element.

 You cannot see them, yet they make up everything…

Atomic Theory and the Atom

Q: What is a proton? A: A proton is a positively charged subatomic particle found IN the nucleus of an atom. Electron Proton Defining the atom: -An atom.

Chapter 4 Atomic Structure

Atomic Structure.

History of Atomic Theory

Atomic Structure History of Atomic Theory. Democritus ( BC) Was the first person to come up with the idea of atom Believed that all matter was.

Early Theories & Subatomic Particles ( )

What are important discoveries related to the structure of an atom?

Atom Models From Democritus to Bohr’s.

Unit: Atomic Structure

Chapter 4: Discovery of Atomic Structure. Prentice Hall © 2003Chapter 2 The Discovery of Atomic Structure An ancient Greek named Democritus was the first.

PART ONE ATOMIC THEORY. Over the course of thousands of years our idea of what matter is made of and what the atom looks like has changed dramatically.

History Behind the Atomic Theory

SCH4C UNIT 1: Matter and qualitative Analysis Atomic Theory

Chapter 4: Atomic Structure

Chapter 4 Atoms and Their Structure History of the atom n Not the history of atom, but the idea of the atom n Original idea Ancient Greece (400 B.C..)

Chapter 4: Atomic Structure

Unit 2: Atomic Theory and Structure. (c. 400 B.C.) Democritus proposed that “atomos” are indivisible. Atom: smallest particle of matter that retains its.

Discovery of the Atom. Democritus  Democritus was an ancient Greek who had a philosophical idea of an atom.  His approach was not based on the scientific.

Chapter 2 (Part I) Atoms, Molecules, and Ions History n Greeks n Democritus and Leucippus - atomos n Aristotle- elements n Alchemy n Robert Boyle-

Chapter 4: Atomic Structure

Atomic Model History.

ATOMIC STRUCTURE Modern theory of matter. LET’S REVIEW Dalton’s atomic theory – Elements are made of atoms ; all atoms of an element are identical, atoms.

The Structure of the Atom Chapter 3 Chemistry: Matter and Change.

A Brief History leading up to Rutherford. Do things come from nothing? Everything is made up of atoms. from the Greek adjective atomos or atomon, ‘indivisible,’

The Atom Unit 3, Presentation 1. History of the atom Not the history of atom, but the idea of the atom – The atom was not “discovered” until recently.

The History of the Atom.

Chapter 3 Atoms and their structure History of the atom n Original idea Ancient Greece (400 B.C.) n Democritus and Leucippus- Greek philosophers. n Aristotle.

Atomic Theory Democritus to Rutherford. Democritus - Ancient Greece w Philosophical question: Could matter be divided into smaller and smaller pieces.

Brief History of Atomic Theory. 1 st atomic models In 400 BC, the model looked like a solid indivisible ball In 400 BC, the model looked like a solid.

The History of the Atom Democritus to Rutherford.

Chapter 3: Atoms, the Building Blocks of Matter. Atomic Theory has Evolved! Leave a few lines to write what we discuss in class!

ATOMIC THEORY. WHAT IS AN ATOM? What makes the elements on the Periodic Table different from each other? What is the name for the center of an atom? What.

Greek Philosop hers Dalton’ s Atomic Theory How atoms differ Radioac tivity Types of radiatio n The atom Subatomic.

Atomic Structure Section 4-1 Greek Philosophers (cont.) Many ancient scholars believed matter was composed of such things as earth,

I. Atomic History A.Democritus ( BC) 1.Ancient Greek philosopher 2.Proposed matter was made of tiny indivisible particles 3.He called them atoms.

Scientists The atom. Democritus BC- Greek philosopher - No experimenting -Matter made up of indivisible particles = “atomos”

Chapter 3: Atoms, the Building Blocks of Matter. Atomic Theory has Evolved! Leave a couple of lines!

Atomic Theorists and their Contributions

Atomic Structure Section 4-1. Democritus Greek philosopher 4 th Century BC First to come up with “atom”. Matter is composed of tiny particles called atoms.

Chapter 3 Atoms and their structure History of the atom n Democritus, a Greek philosopher, originally came up with the idea of an atom (around 400 BC)

Atomic Theory and the Atomic Model. Objectives Describe evidence that Greek philosophers used to develop the idea of atoms. Distinguish between a scientific.

Atomic Theorists The ‘Who’s Who’ of the atomic world.

History of the Atom SWBAT #1: Describe the development of the model of the atom through history SWBAT #2: Identify the main components of the nuclear atom.

Chapter 5 Atomic Structure and the Periodic Table

Atomic History and Theories

Atomic History and Theories

Structure of the Atom Chapter 4.

Atomic Structure Democritus Evolution of Atomic theory Dalton

Unit 2: Atomic Theory & Structure

SCH3U Unit 1: Matter, Chemical Trends and Chemical Bonding

1.3 History of the Atom Objectives 3:a,c,d; 5

Atom Model History - Democritus a fifth century B.C. Greek philosopher proposed that all matter was composed of indivisible particles called atoms (Greek.

Unit 2: Atomic Theory and Structure.

Atomic Structure Ch. 4.

Chapter 8 The Composition of the atom

Research Hypothesis Theory An educated guess based on an observation

Early History of the Atom

4.1 & 4.2 Early Theories & Subatomic Particles

CHAPTER 3 – The Structure of the Atom

Development of Atomic Structure

SCH3U Unit 1: Matter, Chemical Trends and Chemical Bonding

Presentation transcript:

Atoms structures of, properties of, how they affect each other, history of Chapter 18

Ancient Greeks Philosophers Democritus –matter is discrete, not continuous, could not get a smaller piece Leucippus called it atomos,

Late 1700s Dalton Atomic Theory Behavior of matter Tiny indivisible particles called atoms Atoms of the same element are identical Can combine to form compounds Chemical reactions occur when atoms are separated, joined, or rearranged, but atoms of one element are not changed into atoms of another by a chemical reaction

Late 1800sThompson 1898 discovery of the Electron Plum Pudding model-spherical blob of + and – charges inside. Raisins in pudding Basic unit total plus charges = total – charges *means atoms are electrically neutral

1896 Becquerel discovered radioactivity -Uranium Put uranium by photographic plates The plates were exposed and he had pictures of the rocks. Radioactivity is found in many basic elements Alpha Αα Beta Ββ Gama Γγ

Early 1900s Rutherford (Thomson’s student) famous experiment 1911 mainly studying radioactivity Gold foil experiment –when alpha particles (protons) were aimed at a piece of gold foil surrounded by a fluorescent screen, most passed through and a few particles were deflected. The greatly deflected action was not expected Concluded that most passed through because the mass and positive charges were concentrated in one spot in the atom. The rest was empty space and passed through easily (most of it was empty space)

Called this the nucleolus. This is the part of the atom that was deflected instead of passing through the gold foil and was small compared to the size of the atom. Electrons were charged, randomly arranged around the nucleolus in random motion. They moves so that they were not pulled into the nucleolus.