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21 September, 09:13

How do electrons typically fill energy levels?

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  1. 21 September, 12:00
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    The electrons fill energy levels from the lowest available energy level, based of three typical rules.

    1) Follow Aufbau rule: fill from lower to higher energy levels (1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p)

    2) Pauly exclusion principle: two electrons can not have the same four quantum numbers

    3) Hund rule: if the orbitals have the same energy, the electrons must go to different orbitals before two occupies the same orbital.
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