The maximum covalency of a non-metallic group | vedclass

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(D) The group $15$ elements are $N, P, As, Sb, Bi$. The $E-E$ bond strength decreases down the group due to the increase in atomic size,making the $N-

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$4$

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(D) The group $15$ elements are $N, P, As, Sb, Bi$. The $E-E$ bond strength decreases down the group due to the increase in atomic size,making the $N-N$ bond the strongest and the $Bi-Bi$ bond the weakest. However,among non-metallic elements,the $P-P$ bond is significantly stronger than the $N-N$ bond because the small size of the nitrogen atom leads to strong interelectronic repulsion between the lone pairs of the bonded nitrogen atoms. Thus,$N-N$ is the weakest single covalent bond among the non-metallic group $15$ elements.Nitrogen has a maximum covalency of $4$ because it lacks $d$-orbitals in its valence shell,limiting its ability to expand its octet.

The maximum covalency of a non-metallic group $15$ element '$E$' with the weakest $E-E$ bond is:

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