The first ionisation in electron volts of nitrogen and oxygen atoms are, respectively , given by

Monjur Alahi

The first ionisation in electron volts of nitrogen and oxygen atoms are, respectively , given by
A. 14.5,13.5
B. 13.6, 14.6
C. 13.6, 13.6
D. 14.6, 14.6


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Correct Answer - A
N atom has exactly half-filled p-orbitals. Since extra stability is associated with exactly half- filled orbitals, therefore, nitrogen has slightly higher ionization energy than oxygen.

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Correct Answer - C Correct reason : The configuration of N atom is more symmetrical than that of oxygen

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