Development of Atomic Theory In 440 BC, Democritus, a Greek Philosopher theorized that if you cut an object in half, then cut that one in half, you would.

Slides:

Advertisements

Similar presentations

Development of the Atomic Theory

Advertisements

Atoms: Development of the Atomic Theory

Chapter 2- Introduction to Atoms

Introduction to Atoms.

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

Atomic Theory Road Trip through Atomic Theory (Yes! You should take notes on this.)

Chapter 5: Atomic Theory Mr. Albaugh

The Atomic Model Chem 9.

Structure of the Atom - Models Chapter 19 Section 1 – Part 2 Pages

The Atomic Theory. The Atom Protons and Neutrons.

The Development of the Atomic Theory

History Behind the Atomic Theory

Chapter 4.1 – The Development of Atomic Theory 1.Democritus – - Greek philosopher, 4 th century BCE - suggested universe was made of indivisible units.

Using the Periodic Table

Development of the Atomic Theory

For each scientist you need to know  Approximate date of discovery  Discovery  Experiment/Theory  Atomic Structure from their perspective FOCUS.

Development of the Atomic Theory What you should be able to do after studying this lesson/chapter: 1.Describe some of the experiments that led to the current.

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

Unit 3 Lesson 1 The Atom Copyright © Houghton Mifflin Harcourt Publishing Company.

< BackNext >PreviewMain Section 1 Development of the Atomic Theory The Beginning of the Atomic Theory What Is an Element? Around 440 BCE, a Greek philosopher.

Development of the Atomic Theory

ATOMIC STRUCTURE REVIEW AND HISTORY OF THE ATOMIC MODEL Atomic Theory.

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

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.

The Development of Atomic Theory

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

Unit 10: Atoms and Periodicity. An atom is the smallest particle in which matter can be divided and still be the same substance. The same type of atoms.

 Atoms are small hard particles made of a single material that can’t be divided.  Developed his ideas by thinking.

1 Development of Atomic Theory & Atomic Structure.

The Atomic Theory Democritus Dalton 440 B.C. – Thought matter was made of tiny particles – Believed these particles could not be cut into anything smaller.

History of the Atomic Structure

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.

Chapter 11 Introduction to Atoms. Section 1: Objectives  Describe some of the experiments that led to the current atomic theory.  Compare the different.

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.

AtomsSection 1 The Beginnings of Atomic Theory 〉 Who came up with the first theory of atoms? 〉 In the fourth century BCE, the Greek philosopher Democritus.

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.

Midnight Halloween movie showing on October 24th at Broadway Cinemas Paranormal Activity or Witch Hunt- I 8 dollars per ticket Proceeds go to Project Graduation.

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.

Inside The Atom 8 th 2.1 The Story of the Atom. The Story of the Atom Element – substance that cannot be broken down into simpler substances Element –

The Beginning of the Atomic Theory Democritus was a Greek philosopher who was among the first to suggest the existence of atoms. 460 BC – 370 BC.

The Story of... The Atomic Theory! The characters may change, but their ideas connect.

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 2 Development of the Atomic Theory Democritus of Abdera, about BCE Democritus was a Greek.

Atomic Theory and the Atom AC Physical Science Fall 2009.

DEVELOPMENT OF THE ATOMIC THEORY Atom- smallest particle into which an element can be divided and still be the same substance Called the building blocks.

Development of the Atomic Theory Chapter 4 - Section 1 p Vocabulary: 1.atom 2.Electron 3.nucleus 4.electron cloud.

Development of the Atom Model

The Development of Atomic Theory Chapter 4.1 Notes.

Chp. 4 Atomic Theory History  Democritus proposes the first atom.  He says it is a small, hard particle made of a single material formed into different.

The Atomic Theory – p Democritus  Democritus, 440 B.C.  Thought matter was made of tiny particles  Believed these particles could not be cut.

Atomic Theory and Atomic Structure

Atoms: Development of the Atomic Theory

Chapter 11 Section 1 Development of the Atomic Theory

Atoms: Development of the Atomic Theory

Introduction to Atoms Chapter 11.

Section 1 Development of the Atomic Theory

Introduction to Atoms Chapter 11.

Unit 3: Chemistry. Development of the Atomic Theory.

Introduction to Atoms – Chapter 11

Atomic Timeline By Emma Divers.

Atoms: Development of the Atomic Theory

Presentation transcript:

Development of Atomic Theory In 440 BC, Democritus, a Greek Philosopher theorized that if you cut an object in half, then cut that one in half, you would eventually end up with a particle that could not be cut. He called this an atom. From the Greek word Atomos, meaning “not able to be divided.”

Development of Atomic Theory In 1803 British chemist John Dalton published his atomic theory. In 1803 British chemist John Dalton published his atomic theory. All substances made of atoms, which are small, cannot be created or divided or destroyed. All substances made of atoms, which are small, cannot be created or divided or destroyed. Atoms of same element are alike; different elements made of different atoms. Atoms of same element are alike; different elements made of different atoms. Atoms join with different atoms to form new substances. Atoms join with different atoms to form new substances.

Development of Atomic Theory In 1897, the British scientist J.J. Thomson discovered small particles inside of atom. In 1897, the British scientist J.J. Thomson discovered small particles inside of atom. Negatively charged particles he called corpuscles (electrons). Negatively charged particles he called corpuscles (electrons). Cathode ray tube experiment. Cathode ray tube experiment. Plum-pudding model: Positive particles mixed with negative particles. Plum-pudding model: Positive particles mixed with negative particles.

Development of Atomic Theory J J Thomson: Cathode ray tube experiment

In 1909, Earnest Rutherford, a former student of Thomson performed “gold foil experiment.” ntialchemistry/flash/ruther14.swf In 1909, Earnest Rutherford, a former student of Thomson performed “gold foil experiment.” ntialchemistry/flash/ruther14.swf ntialchemistry/flash/ruther14.swf ntialchemistry/flash/ruther14.swf 1911 published revised atomic theory published revised atomic theory. Nucleus: tiny, dense, positively charged center of atom where most of the mass is located. Nucleus: tiny, dense, positively charged center of atom where most of the mass is located. Development of Atomic Theory

1913 Neils Bohr, Danish scientist, who worked with Rutherford Neils Bohr, Danish scientist, who worked with Rutherford. Electrons traveled in definite paths at specific distances from the nucleus. Electrons traveled in definite paths at specific distances from the nucleus.

Development of Atomic Theory Austrian physicist Erwin Schr ö dinger & German physicist Werner Heisenberg Austrian physicist Erwin Schr ö dinger & German physicist Werner Heisenberg Electrons do not move in definite paths. Electrons do not move in definite paths. Electron paths cannot be predicted. Electron paths cannot be predicted. “ Electron cloud ” related to the paths described in Bohr ’ s model. “ Electron cloud ” related to the paths described in Bohr ’ s model.

Development of Atomic Theory Parts of an atom Parts of an atom Nucleus Proton Neutron Electron