For which element will the inert pair effect | vedclass

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(B) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds of post-transition element

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$Fe$

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(B) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds of post-transition elements,particularly in the $p$-block elements of the $6^{th}$ period and some $5^{th}$ period elements.$Sn$ ($5^{th}$ period),$Pb$ ($6^{th}$ period),and $In$ ($5^{th}$ period) are $p$-block elements that exhibit the inert pair effect.$Fe$ is a $d$-block element (transition metal) and does not exhibit the inert pair effect.

For which element will the inert pair effect not be observed?

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