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Elijah Tilstra 2nd Hour

Published on Nov 19, 2015

I forgot to show you this yesterday when my wifi didn't work

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PRESENTATION OUTLINE

1.

ATOMIC THEORY TIMELINE

2.

DEMOCRITIS 400 BC

  • Atomos theory
3.

ATOMOS THEORY

  • First to discover atoms
4.

ARISTOTLE

380 BC
5.

ARISTOTLE

  • 4 elements theory
  • Did not believe in atoms
  • Everything is made of fire and water
  • Disclosed Democritus's theory
6.

DALTON

1800S
7.

BILLIARD BALL THEORY

  • Resurfaced theory of atoms
  • Believed atoms were plain
  • They resembled a billiard ball
8.

JJ THOMSON

1897
9.

PLUM PUDDING MODEL

  • Used cathode ray experiment
  • Discovered atoms were made up of smaller parts
  • They resembled plum pudding
10.

RUTHERFORD

1899
11.

POSITIVELY CHARGED NUCLEUS

  • Discovered atoms have a nucleus
  • Nucleus has positive charge
  • Used gold foil experiment
12.

MILLIKAN

1909
13.

ELECTRONS

  • Discovered electrons using oil drop experiment
  • Discovered that electrons have a negative charge
14.

CHADWICK

1932
15.

NEUTRONS AND PROTONS

  • Discovered nuetrons
  • Discovered protons
  • Nuetrons have no charge
  • Protons have positive charge

Elijah Tilstra