Question

Calculate the effective nuclear charge for 3d-electron of nickel atom.

Answer 1

The expression for the effective nuclear charge $Z^{\ast }$ is
$Z^{\ast }=Z-S$
Here, Z is the nuclear charge and S is the shielding constant.
For nickel $Z=28$ and $S=20.45$
Hence, $Z^{\ast }=Z-S=28-20.45=7.55$
Hence, the effective nuclear charge for Nickel atom is 7.55.