Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has

A High bond dissociation energy
B Smaller atomic radius
C Stable half filled 2p sub level
D High nuclear charge

Correct Answer: Stable half filled 2p sub level

Nitrogen has a half filled orbital. On the other hand, since Oxygen is already unstable relative to Nitrogen, by losing one electron it attains a stable half filled orbital. So oxygen undergoes ionisation at a relatively lower energy. This is why nitrogen has a higher ionisation energy than oxygen.
Bissoy MCQ
#General Knowledge #Chemistry

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