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Q.
Which of the following metals does not show inert pair effect?
The p-Block Elements
Solution:
Inert pair effect means that the $2 s$-electrons of the valence shell of heavier p-block elements form an inert pair and do not participate in bond formation. Inert pair effect occurs due to the poor shielding effect of $d$ and forbitals. Hence, due to small size and absence of $d$ and forbitals, Aluminium does not show inert pair effect.