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Planck
Said that energy is emitted in discrete pieces called quanta
Bohr
Proposed a model of the atom in which electrons are at specific energy levels surrounding the nucleus
Einstein
Proposed LIGHT acts both as a wave and a particle
Schrodinger
Developed a set of wave equations to provide the most probable location of an electron
Heisenberg
Said we cannot know the exact position or velocity of an electron
Pauli
No two electrons can have the same 4 quantum numbers
Hund
Every orbital of the same energy level must have 1 electron before a second electron can be added
Aufbau
Said electrons will fill the lowest energy orbital available before moving to a higher energy orbital
DeBroglie
Proposed ELECTRONS also behave as both a wave and particle