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Atomic History

Published on Nov 18, 2015

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1.

ATOMIC HISTORY

SAVANNAH MCLAUGHLIN
Photo by kevin dooley
2.

Democritus-
Atomic Theory
•Atoms are indivisible and indestructible
•Atoms are unique to its element
•Atoms can be combined to make new substances

Photo by Ian W Scott
3.

Atomos-
uncut, indivisible

4.

John Dalton's Atomic Theory:
•All matter is an arrangement of atoms
•All atoms of a given element are identical in mass and volume
•Compounds are formed by a combination of two or more different kinds of atoms
•A chemical reaction is a rearrangement of atoms

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5.

John Dalton's representation of the atom

Photo by Steve Snodgrass
6.

J.J. Thomson
Discovered the electron, the first subatomic particle

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7.

J.J. Thomsons Model of the Atom:

8.

Ernest Rutherford discovered that atoms have their charge concentrated in a very small nucleus.

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9.

Ernest Rutherford's model of the atom is a nucleus of protons and neutrons, with electrons orbiting it.

Photo by Sarah G...
10.

Niels Bohr
"Energy levels of electrons are discrete, and that the electrons revolve in stable orbits around the atomic nucleus."

Photo by Bradley Wind
11.

Niels Bohr Atom Model

12.

Modern Electron Theory:
Made by Erwin Schrödinger and Werner Heisenberg

Photo by Arenamontanus
13.

The Electron Cloud is where electrons are when they rotate around the nucleus of an atom.

Savannah McLaughlin