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(A) The density of transition elements generally increases across a period from $Sc$ to $Cu$ because the atomic radius decreases while the atomic mass

Vedclass · Accepted Answer

$Cu > Ni > Zn > Sc$

Vedclass · Answer

(A) The density of transition elements generally increases across a period from $Sc$ to $Cu$ because the atomic radius decreases while the atomic mass increases.$Zn$ has a lower density than $Cu$ and $Ni$ due to its larger atomic radius resulting from the completion of the $3d^{10}$ subshell,which leads to increased electron-electron repulsion.Therefore,the correct order of density for these elements is $Cu > Ni > Zn > Sc$.

Which of the following represents the correct order of density for the given $3d$ series elements?

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