1.

Inert pair effect what ❓?

Answer» The reluctance of s electron pair in take part in chemical bonding
In the elements of 4th, 5th and 6th period of the p-block the electrons present in the intervening d and f-orbitals do not shield the r-electrons of the valence shell effectively.As a result, {ns}2 -electrons remain more tightly held by the nucleus and hence, do not participate in bonding. This is called inert pair effect.


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