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
Sir JJ Thompson
1897
English
Contribution
Discovered electrons and proposed a model for the structure of the atom.
Knew of the negative charge of electrons and thought that matter must have a positive charge.
Found this out through his cathode ray experiment.