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History Of The Atom Timeline Jason Klinkner And Joey Krenik

Published on Mar 22, 2016

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1.

DEMOCRITUS

  • 460 BCE
  • He thought atoms were solid and invincible
2.

JOSEPH BLACK

  • 1728
  • He discovered fixed air is denser than air
3.

ANTOINE LAVOSIER

  • 1778
  • The law of conservation of means state that mass is an isolated system
4.

JOHN DALTON

  • 1766
  • All matter is made up of atoms
5.

WILHELM RÖNTGEN

  • 1845
  • X radiation
  • He found the hottest spot of the spectrum
6.

EUGEN GOLDSTEIN

  • 1850
  • He discovered cathode ray, electron, nucleus and proton
7.

HENRI BECQUEREL

  • 1852
  • He discovered x rays are influenced by light from uranium salts
8.

SIR JOSEPH JOHN THOMSON

  • 1856 He discover the cathode is in every atom
  • His model of the atom was 1000 times smaller than an atom
9.

MARIE CURIE

  • 1867 She discovered radioactivity
  • Discovered radium and polonium
10.

ERNEST RUTHERFOLD

  • 1871
  • Radiation can pass through 100 times more foil before it was absorbed
  • His model looked like a tiny dense positively charged atom
11.

JAMES CHADWICK

  • 1891 He discovered neutrons are in every atom

Jason Klinkner