Q639
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
AnswerD.
High nuclear charge
Answer: Option C
Solution
Answer: Option C
Solution:
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.