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(C) In a period of $d$-block transition metals,the atomic radii (and consequently atomic volumes) initially decrease due to the increase in effective

Vedclass · Accepted Answer

Remain approximately the same

Vedclass · Answer

(C) In a period of $d$-block transition metals,the atomic radii (and consequently atomic volumes) initially decrease due to the increase in effective nuclear charge. However,as more electrons are added to the $(n-1)d$ subshell,the screening effect increases,which balances the nuclear attraction. Consequently,the atomic radii remain nearly constant across the middle of the series before increasing slightly at the end due to electron-electron repulsions. Therefore,the overall trend is that they remain approximately the same.

On moving from left to right in a period within the $d$-block transition metals,how do their atomic volumes change?

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