Question

Why is single N-N bonds weaker than single P-P bonds ?

Answer 1

N-N sigma bond is weaker than P-P sigma bond due to the small bond length between the nitrogen atoms. The non-bonding electrons(lone pair of electrons) of both the atoms repel each other making it weaker than P-P sigma bond.

Answer 2

N−N single bond is weaker than the P−P bond because of the smaller length of N in comparison to P is the reason.

Explanation:

• A smaller length of N ends in a smaller N−N bond length. As a result, the lone pair of electrons on each of the N atoms repel every different main to unstability or weakening of the  N−N bond.
• Because of the bigger length of the  P atom, the  P−P bond period is greater and the lone pair-lone pair repulsion among P atoms is much less which makes the P−P bond stronger than the  N−N bond.

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