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August 20, 2014

August 20, 2014

Posted by **Jordan** on Monday, July 18, 2011 at 10:57am.

Thanks!! :)

- AP HS Chemistry -
**bobpursley**, Monday, July 18, 2011 at 12:34pmHund's rule: Electrons will occupy single orbits in different orbitals before any orbital has a pair of electrons.

ie: if you have three electrons to put in to three empty p orbitals, then one electron will go into each orbital, in no case will two go into one orbital before each orbital has at least one eletctron.

Pauli Exclusion: No electron can have the same set of quantum numbers, ie, no two electrons can occupy the same exact energy state in an atom.

Aufbau: This is a principle that says if an atom has empty electron positions, the and you start filling the available energy levels, each electron will go into the lowest energy level then currently available (remember pauli on this).

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