Chemistry - f-block Question with Solution | TestHub

$\mathrm{Gd}(64)=[\mathrm{Xe}]4f^{7}5d^{1}6s^2$ ${\mathrm{Gd}}^{3+}=[\mathrm{Xe}]4f^{7}5d^{0}6s^0$ i.e. no. of unpaired electrons $=7$ $\begin{array}{rl}\mu & =\sqrt{n(n+2)}=\sqrt{7(7+2)}\\ & =\sqrt{63}=7.93BM\end{array}$