Question
Why does the reactivity of nitrogen differ from phosphorus?
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Answer
Nitrogen molecule is a diatomic and the two nitrogen atoms are linked by triple bond (N ≡ N). Forming a $\text{P}\pi-\text{P}\pi$ bonding and thus the bond dissociation energy is very high $(946$ kj mol$^{–1})$, it is not possible to cleave the triple bond so easily. Therefore, the reactivity of nitrogen differ from phosphorus.
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