Identify the correct order in which the coval | vedclass

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(A) The electronic configurations are as follows:${}_{20} Ca = [Ar] 4s^2$${}_{21} Sc = [Ar] 4s^2, 3d^1$${}_{22} Ti = [Ar] 4s^2, 3d^2$As we move from $

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$(I) < (III) < (II)$

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(A) The electronic configurations are as follows:${}_{20} Ca = [Ar] 4s^2$${}_{21} Sc = [Ar] 4s^2, 3d^1$${}_{22} Ti = [Ar] 4s^2, 3d^2$As we move from $Ca$ to $Ti$ across the period,the effective nuclear charge $(Z_{eff})$ increases because the $d$-orbitals have a diffused shape and provide poor shielding of the nuclear charge.Consequently,the atomic size decreases as we move from $Ca$ to $Sc$ to $Ti$.The order of atomic size is $Ca > Sc > Ti$.Therefore,the order of increasing covalent radius is $(I) < (III) < (II)$.

Identify the correct order in which the covalent radius of the following elements increases: $(I)$ $Ti$,$(II)$ $Ca$,$(III)$ $Sc$.

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