Atomic Theory Timeline
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Aristotle
Democritus
Antoine Lavoisier
John Dalton
Sir JJ Thompson
Robert Millikan
Sir Earnest Rutherford
Neils Bohr
Sir James Chadwick
Erwin Schrodinger
Wolfgang Pauli
Friedrich Hund
The Aufbau Principle
Albert Einstein
Otto Hahn, Lise Meitner, and Fritz Strassman
Otto Hahn, Lise Meitner, and Fritz Meitner
1932-1940s
Hahn (top) German
Meitner (middle) Austrian
Strassman (bottom) German
Contribution
First to recognize that uranium atom split when bombarded by neutrons.
Nuclear Fission
Discovered Barium
Gave the foundation of nuclear weaponry