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Question

Nitrogen is restricted to a maximum covalency of 4 since only four (one s and three p) orbitals are available for bonding. The heavier elements have vacant d orbitals in the outermost shell which can be used for bonding (covalency) and hence, expand their covalence as in PF6.

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Solution


Nitrogen does not have vacant d-orbital to exceed its covalency beyond 4 and hence have only 4 orbitals available for bonding.
Whereas heavier elements have vacant d-orbitals which can be used for bonding and hence expand their covalence as in PF6
P=3s23p3
(Refer to Image)

1011056_1036887_ans_24bf8ed2b44f4114a91b441ffebfc19c.PNG

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