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
Wolfgang Pauli
1925
Austrian born Swiss
Contribution
explained the behavior of electrons.
electrons orbit the nucleus.
Pauli exclusion principle
no two electrons in an atom can have the same quantum numbers.