Question

Why nitrogen can't extend it's valency beyond 4

Answer 1

$\bf\large\underline\pink{Answer:-}$

The fourth covalent bond is actually a coordinate covalent bond, formed when that nitrogen atom's lone pair gets donated to a proton. This is also the maximum covalency for the nitrogen atom, since it has no more unpaired electrons that could be paired up with other atoms, to form more covalent bonds.

Answer 2

Answer:

Nitrogen has valency 3.

The outer most orbital has 5 electrons so nitrogen can accept 3 electrons to complete its octet.

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