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Molecular Orbital Diagram

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A molecular orbital diagram ranks a molecule's bonding and antibonding orbitals by energy and fills them using the same Aufbau, Pauli, and Hund rules.

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Nitrogen's ten valence electrons fill the diagram's ranked orbitals lowest-energy first, completing the bonding and antibonding orbitals in energy order.

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The same three filling rules from atomic configuration carry over unchanged; no new filling procedure applies.