Atomic Theories. Greek 2000 yrs ago Democratis - different shapes and sizes. Smallest piece can be obtained All atoms made of same material.

Slides:

Advertisements

Similar presentations

By Pablo Acuña.. Introduction All materials are made of matter. Matter is anything that has mass and volume. The basic buildings of matter are atoms.

Advertisements

Atoms: Development of the Atomic Theory

The History of Atomic Theory

History of Atomic Theory 1

Powers of 10 What is the smallest unit of matter? Can we see atoms?

Atoms: Development of the Atomic Theory

The History of Atomic Theory

Atoms Mr. Skirbst Physical Science Topic 13. Atomic Models.

The History of Atomic Theory

9/10/12 Atom and the History of the Atom

Atoms: Development of the Atomic Theory

Chapter 5: Atomic Theory Mr. Albaugh

Investigating Atoms and Atomic Theory

Chapter 3 The History of the Atom. I. The Scientists and their Discoveries A.Democritus 1. Date = 400 B.C 2. Discovery = Theorized the smallest unit of.

The Atomic Theory. The Atom Protons and Neutrons.

The History of the Atom.

The Development of the Atomic Theory

Atomic Models. JOHN DALTON Early 1800’s Thought atoms were smooth, hard balls that could not be broken into smaller pieces. All elements are made of atoms.

Chapter 4: Atomic Structure

The History of Atomic Theory

Investigating Atoms and Atomic Theory Students should be able to: Students should be able to: Describe the particle theory of matter. PS.2a Describe the.

What is an atom??? An atom is the smallest particle of an element that retains its identity in a chemical reaction.

What is an _________? The smallest particle of an ________ that is still an ________ _________ are the building blocks of all ___________.

Development of the Atomic Theory

8 TH Grade Development of Atomic Theory. 1. Democritus (430 BC) proposes the idea that matter is formed of small pieces that could not be cut into smaller.

1.3 Atomic Theory 1. John Dalton’s atomic theory - Matter is made up of small particles called atoms - Atoms cannot be created, destroyed or divided.

History of Atomic Structure. Ancient Philosophy Who: Aristotle, Democritus When: More than 2000 years ago (400 B.C.) Where: Greece What: Aristotle believed.

History of Atomic Structure. Ancient Philosophy Who: Aristotle, Democritus When: More than 2000 years ago Where: Greece What: Aristotle believed in 4.

Atomos: Not to Be Cut The History of Atomic Theory Date Objective: Identify Scientists and their contributions to the Atomic Theory.

Atomic Models 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.

Basics Of Chemistry 8 th Science Matter Defined ► Matter – anything that has volume or mass. ► Everything you see and don’t see.

Chapter 4.1 An Atomic Model of Matter

Warm Up: Density 9/10/14 1. Mass = 40g Volume = 20mL What is the Density? ___________ 2. Mass = 35g Density = 5 g /cm3 What is the Volume? 3. Density.

Development of the Atomic Theory. Democritus 460 BC - Greek philosopher proposes the existence of the atom ; calls it Atomos meaning indivisible. His.

Democritus This is the Greek philosopher Democritus who began the search for a description of matter more than 2400 years ago. This is the Greek philosopher.

Chapter 5 Atoms: Building Blocks of Matter. Evidence Direct evidence is when you do something to gather the evidence Examples are Doing an experiment.

Atomic Theories: How do we know what atoms are made of?

DEVELOPMENT OF THE ATOMIC THEORY ATOMS. 460 BC - Greek philosopher proposes the existence of the atom He pounded materials until he made them into smaller.

Activity #38 Atomic Theory: How do we know what atoms are made of? In science, we use models to help us understand particles, like atoms, that are too.

Investigating Atoms and Atomic Theory Students should be able to: – Describe the particle theory of matter. PS.2a – Use the Bohr model to differentiate.

A Brief History of the Atomic Theory. 460 B.C. : Democritus Greek Philosopher Proposed that matter cannot be broken down indefinitely At some point you.

The Atomic Theory. Atom  The smallest particle into which an element can be divided and still be the same substance.  The smallest particle of an element.

Atomos The History of Atomic Theory. Atomic Models A model uses ideas to explain facts A model can be changed as new information is collected.

The History of the Atom. Aristotle  Aristotle was the first scientist that we have record of questioning what stuff was made of.  What did he think?

The Atom What defines the property of a substance.

Atomos: Not to Be Cut The History of Atomic Theory.

Atomos: Not to Be Cut The History of Atomic Theory.

Who are these men?.

The History of Atomic Theory. Democritus B.C. Believed the universe was made of empty space and tiny bits of stuff called atoms that couldn’t.

(8th) Chapter 4-1 Cornell Notes “Introduction to Atoms”

S. Aldrich HISTORY OF THE ATOM 460 BCE Democritus develops the idea of atoms He believed that you could cut objects in half, over and over again,

Atomic Models 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.

Atomos: Not to Be Cut The History of Atomic Theory.

HISTORY OF THE ATOM AND ATOMIC THEORY

How did the atomic model come about?

Atoms: Development of the Atomic Theory

Evolution of the atomic model

Atoms: Development of the Atomic Theory

The Atomic Structure of Atoms

The History of Atomic Theory

The History of Atomic Theory

The Atomic Structure of Atoms

Atomic Theories: How do we know what atoms are made of?

The History of Atomic Theory

Atoms: Development of the Atomic Theory

Presentation transcript:

Atomic Theories

Greek 2000 yrs ago Democratis - different shapes and sizes. Smallest piece can be obtained All atoms made of same material.

John Dalton 1803 Atoms of different element are not alike. Compounds are formed from atoms of 2 or more elements. Atoms cannot be divided.

John Thompson 1897 Atom has a (+) charged “pudding” Discovered “electrons” are scattered inside pudding Atoms can be divided Atoms have an overall neutral charge Received Nobel

Ernest Rutherford 1911 (+) charges are inside the nucleus (-) electrons are outside the nucleus Performed “Bullet” experiment

In 1911, Rutherford deduced from these results that almost all of the mass of an atom, an object so small that it would take over five million of them side-by-side to cross a full stop on this page, is concentrated in a nucleus a thousand times smaller than the atom itself. (If the orbital electrons in our atoms were compressed into the nucleus we would occupy the space of a small grain of sand.) The nuclear model of the atom had been born. Rutherford’s Bullet Experiment

Niels Henrik Bohr 1913 Electrons move in orbits around the nucleus Electrons are found at the certain distances from nucleus

Wave Modern Electrons don’t move around in a definite path. We can only predict where an electron might be.