Tue June 12, 2012 By: Prkriti Gupta

why accept nitrogen all the elements show allotropy

Expert Reply
Wed June 13, 2012
Except nitrogen and bismuth, all the elements of group-15 show allotropy. Nitrogen does not show allotropy because of its small size and high electronegativity. The single N-N bond is weaker than P-P bond because of high inter electronic repulsions among non-bonding electrons due to the small bond distance. Hence it does not show allotropy.
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