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Nitrogen has the electronic configuration 1s2, 2s2, 2p1x, 2p1y, 2 p1z and not 1s2, 2s2, 2p2x, 2p1y, 2 p0z which is determined by:
(1) Aufbau's principle
(2) Pauli's exclusion principle
(2) Hund's rule
(40) Uncertainty principle
ans: Hund's rule
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