Chemistry - f-block Question with Solution | TestHub

The general electronic configuration is $(n-2)f^{-14}(\mathrm{n}-1){\mathrm{d}}^{0-1}n{s}^2$ Related Theory $\begin{array}{ll}\text{ Element }& \begin{array}{l}\text{ General outer electronic configuration }\end{array}\\ s\text{-block }& n{s}^{l-2}\text{, wheren }n=2-7\\ \text{ p-block }& n{s}^{2}n{p}^{\prime 4},\text{ wheren }n=2-6\\ \text{ d-block }& \begin{array}{l}(n-l)d^{1-10},n{s}^{0-2}\text{, where }n=4-7\end{array}\\ \text{ f-block }& \begin{array}{l}(n-2)f^{1-14}(n-l)d^{n-1}{f}^{f-14}n{s}^2,\\ \text{ where }n=6-7\end{array}\end{array}$