Presentation is loading. Please wait.

Presentation is loading. Please wait.

THE ATOM Around 400 B.C. a Greek philosopher, Democritus, proposed that all forms of matter were divisible into extremely small fundamental particles called.

Published byJulianna Alexina Small Modified over 5 years ago

Similar presentations

Presentation on theme: "THE ATOM Around 400 B.C. a Greek philosopher, Democritus, proposed that all forms of matter were divisible into extremely small fundamental particles called."— Presentation transcript:

1 THE ATOM Around 400 B.C. a Greek philosopher, Democritus, proposed that all forms of matter were divisible into extremely small fundamental particles called atomos. (Greek for indivisible) Due to world events, this concept was forgotten, replaced by the belief that matter was composed of four “elements” ; earth, wind, fire, & water. From 1803 to 1810, John Dalton proposed the concept of the atom once again. Dalton backed his claim with experimentation.

2

3 The modern atom is composed of subatomic particles.

4

5 Subatomic Particles ELECTRON: Properties discovered in 1897 by JJ Thompson PROTON: Isolated and identified in 1919 by Ernest Rutherford NEUTRON: Discovered by James Chadwick in 1932

6

7 Nuclear Model of the Atom
Every atom contains an extremely small, extremely dense nucleus. All of the positive charge and nearly all of the mass of an atom are concentrated in the nucleus. The nucleus is surrounded by a much larger volume of nearly empty space that makes up the rest of the atom. The space outside the nucleus is very thinly populated by electrons, the total charge of which exactly balances the positive charge of the nucleus.

8 may come in one of three forms:

9

10

Download ppt "THE ATOM Around 400 B.C. a Greek philosopher, Democritus, proposed that all forms of matter were divisible into extremely small fundamental particles called."

Similar presentations

Chapter 4 Atomic Structure.

Chapter 4 Atomic Structure.
Unit: Atomic Structure

Unit: Atomic Structure
Atomic Structure. 1. Democritus: Around 300 BC, a Greek philosopher, Democritus stated that everything is made up of tiny, invisible particles He said.

Atomic Structure. 1. Democritus: Around 300 BC, a Greek philosopher, Democritus stated that everything is made up of tiny, invisible particles He said.
The Modern Nuclear Atom How did our concept of the atom come about, and how did it develop?

The Modern Nuclear Atom How did our concept of the atom come about, and how did it develop?
Development of the Atomic Theory. Democritus 460 BC - Greek philosopher proposes the existence of the atom ; calls it Atomos meaning indivisible. His.

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

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

History of the Atom and Periodic Table.  Around 400 B. C., Democritus claimed all matter was made of tiny, indivisible particles called “atoms”.  Aristotle.
Atomic Structure. Early Theories of Matter Democritus (460-370 BCE) Democritus (460-370 BCE) Greek philosopher Greek philosopher First to propose the.

Atomic Structure. Early Theories of Matter Democritus ( BCE) Democritus ( BCE) Greek philosopher Greek philosopher First to propose the.
THE HISTORY OF THE ATOMIC MODEL. DEMOCRITUS 460 B.C. TO 370 B.C. All matter consists of extremely small particles that cannot be divided. Called them.

THE HISTORY OF THE ATOMIC MODEL. DEMOCRITUS 460 B.C. TO 370 B.C. All matter consists of extremely small particles that cannot be divided. Called them.
Chapter 4 Atomic Structure

Chapter 4 Atomic Structure
Integrated Chemistry and Physics

Integrated Chemistry and Physics
Democritus/Leuccippos 400 BC

Democritus/Leuccippos 400 BC
Scientists and Their Contribution to the Model of an Atom

Scientists and Their Contribution to the Model of an Atom
Atomic Structure.

Atomic Structure.
Atomic History and Theories

Atomic History and Theories
Atomic Models Dalton round ball with a positive nucleus

Atomic Models Dalton round ball with a positive nucleus
4.1 NOTES The History of the Atom

4.1 NOTES The History of the Atom
Atomic Theory “History of. . . ”.

Atomic Theory “History of. . . ”.
Chapter 4 The Structure of the Atom

Chapter 4 The Structure of the Atom
Atomic Theory Label the 3 different particles that make up an atom

Atomic Theory Label the 3 different particles that make up an atom

Similar presentations

Ads by Google