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

Slides:

Advertisements

Similar presentations

History of Atomic Structure

Advertisements

BELL RINGER What are the three subatomic particles? (Things smaller than an atom, you learned in 8 th grade)

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

Atomic Theory “History of. . . ”.

 Warm-Up: Atom Probe  Classwork: Atom notes; Create a Timeline  Homework: The Atoms Family Album (Glue In)

History of the Atomic Theory

The History of Atomic Theory

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

History of Atomic Theory

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

History of Atomic Structure

Atom Models From Democritus to Bohr’s.

The History of the Atom.

B y: Dev Patel and Arnold Hernandez. Aristotle/Democritus (Ancient Philosophy)  Who- Aristotle and Democritus  When-More than 2,000 years ago  Where-Greece.

The Development of the Atomic Theory

Atomic Structure. Way Early Theories Democritus ( BC) –First person to propose that matter is not infinitely divisible –Atomos –Matter is empty.

History of Atomic Structure Atoms: their parts & pieces.

Atomic Theory: A Timeline More than 2000 years ago ancient philosophers had theories on matter BC - Democritus believed that matter was made of.

Section 1- Discovering the parts of the atom

Development of the Atomic Theory

Development of Atomic Structure How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years.

History of Atomic Theory

How long have people been interested in understanding matter and its structure? Thousands of years Hundreds of years A few years Never.

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

Atomic Model History.

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.

Read and Answer questions on pages 283 and 286 Read and Answer questions on pages 283 and 286 Make a timeline with the following scientists: Make a timeline.

History of Atomic Theory. Matter  The things around you that are matter (tables, air, people) consist of different types of atoms.

Development of Atomic Structure How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years.

History of the Atom. What do you know about the atom? Put simply, the atom is the smallest particle of pure essence. For example, helium gas is made up.

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.

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

History of the Atom Democritus Democritus: It was 400 BC when he came up with the idea that matter could not be divided indefinitely. This lead to the.

History of Atomic Structure Atoms and their parts.

BY Dhruv Rana, Miguel Rivas, Cristian Tapia.  More than 2000 years ago  Were from Greece  Aristole believed in four elements: Earth, Water, Wind, Fire.

Atomic Structure.

By: Jeremy Aponte, Javier Candelaria, Eric Mendoza.

The Development of a Modern Theory of the Atom Aristotle Democritus.

Introduction to Atoms. Vocabulary Atom- Sub-atomic Particles- Nucleus- Atomic Models-

History of Atomic Structure. How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years.

History of the atom: History of the atom: Changing atomic models.

How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years C.A few years D.Never.

The History of the Atom.

History of Atomic Structure. Aristotle Democritus.

Bellwork10/12/06 How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years C.A few years.

The Changing Model of the Atom

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

Bellwork08/20/2012 How long have people been interested in understanding matter and its structure? A.Thousands of years B.Hundreds of years C.A few years.

Historical Development of an Atom. Democritus B.C Democritus was a Greek philosopher ( B.C.) who is the father of modern atomic thought.

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 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.

History of the Atomic Theory An atom is the smallest particle of an element that retains its identity in a chemical reaction. Our current theory of the.

History of the Atom and Periodic Table.  Around 400 B. C., Democritus claimed all matter was made of tiny, indivisible particles called “atoms”.  Aristotle.

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

The Changing Model of the Atom From Democritus to Bohr.

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

The Changing Model of the Atom. Aristotle 400 BCE claimed that there was no smallest part of matter different substances were made up of different proportions.

The History of Atomic Theory

Early Atomic Theories and the Origins of Quantum Theory 3.1 and 3.2

Bellwork 10/12/06 How long have people been interested in understanding matter and its structure? Thousands of years Hundreds of years A few years Never.

History of Atomic Structure

History of Atomic Structure

Discovering the Atom.

Early Atomic Theories and the Origins of Quantum Theory 3.1 and 3.2

Development of Atomic Structure

Development of Atomic Structure

Bell work Challenge Winning Group Will Earn +10 Test Points

Presentation transcript:

History of Atomic Structure

Ancient Philosophy Who: Aristotle, Democritus When: More than 2000 years ago Where: Greece What: Aristotle believed in 4 elements: Earth, Air, Fire, and Water. Democritus believed that matter was made of small particles he named “atoms”. Why: Aristotle and Democritus used observation and inference to explain the existence of everything.

Aristotle Democritus

Alchemists Who: European, Middle East, and Chinese “Scientists” When: 800 – 900 years ago Where: Europe What: Their work developed into what is now modern chemistry. Why: Trying to change ordinary materials into gold. Robert Boyle debunked alchemy, regarded as the first modern chemist, The Skeptical Chemist, 1661.

Father of Modern Chemistry Robert Boyle

Alchemic Symbols

Particle Theory Who: John Dalton When: 1808 Where: England What: Described atoms as tiny particles that could not be divided. Thought each element was made of its own kind of atom. Why: Building on the ideas of Democritus in ancient Greece.

John Dalton

Discovery of Electrons Who: J. J. Thompson When: 1897 Where: England What: Thompson discovered that electrons were smaller particles of an atom and were negatively charged. Why: Thompson knew atoms were neutrally charged, but couldn’t find the positive particle.

Cathode Ray Experiment

Interactive Cathode Ray Tube Experiment

J. J. Thompson

Discovery of Nucleus Who: Ernest Rutherford When: 1911 Where: England What: Conducted an experiment to isolate the positive particles in an atom. Decided that the atoms were mostly empty space, but had a dense central core. Why: He knew that atoms had positive and negative particles, but could not decide how they were arranged.

Gold Foil Experiment

Rutherford's Experiment

Ernest Rutherford

Atomic Structure II Who: Niels Bohr When: 1913 Where: England What: Proposed that electrons traveled in fixed paths around the nucleus. Scientists still use the Bohr model to show the number of electrons in each orbit around the nucleus. Why: Bohr was trying to show why the negative electrons were not sucked into the nucleus of the atom.

Niels Bohr

Electron Cloud Model Electrons travel around the nucleus in random orbits. Scientists cannot predict where they will be at any given moment. Electrons travel so fast, they appear to form a “cloud” around the nucleus.

Electron Cloud Model