Which of the following elements does not exhi | vedclass

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(A) Variable valency is typically exhibited by transition elements and some $p$-block elements due to the presence of vacant $d$-orbitals or the inert

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$Ba$

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(A) Variable valency is typically exhibited by transition elements and some $p$-block elements due to the presence of vacant $d$-orbitals or the inert pair effect.$Ba$ (Barium) is an alkaline earth metal belonging to group $2$.It has a fixed valency of $+2$ because it loses its two valence electrons to achieve a stable noble gas configuration.$Ti$,$Cu$,and $Pb$ are known to exhibit variable valencies.

Which of the following elements does not exhibit variable valency?

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