The ionization potential of nitrogen is more than that of oxygen because of

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the greater attraction of the electrons by the nucleus

the extra stability of the half filled p - orbitals

the smaller size of nitrogen

more penetration effect

answer is B.

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Detailed Solution

Nitrogen-[He]2s22p3Oxygen- [He]2s22p4Nitrogen atom has symmetrical half filled configuration.Hence IP of nitrogen is more than that of oxygen.

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