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
Friedrich Hund
1927 (formulated his rule)
German
Contribution
developed a method to use molecular orbitals to determine electron structure of molecules and bonds.
Hund's Rule
set of rules that determine the ground state of a multi-electron atom based on the energy levels of the filled orbitals.