what are the three rules that govern the filling of atomic orbitals by electrons

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28-12-2014
Biology

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what are the three rules that govern the filling of atomic orbitals by electrons

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lrathburn lrathburn · Answer 1 · 2015-01-04T23:46:21-05:00

lrathburn lrathburn

04-01-2015

Rule 1. aufbau rule - energy levels filled so lowest energy level filled first.
Rule 2. pauli exclusion principle - maximum of 2 electrons may be placed in each energy level. Provided the spins of electrons are of opposite sign.
Rule 3. hunds rule - when energy levels are equal one electron is added to each energy level in turn with their spins unpaired until each energy level has one electron.

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