Question
General electronic configuration of lanthanides are
A.
$$\left( {n - 2} \right){f^{1 - 14}}\left( {n - 1} \right){s^2}{p^6}{d^{0 - 1}}n{s^2}$$
B.
$$\left( {n - 2} \right){f^{10 - 14}}\left( {n - 1} \right){d^{0 - 1}}n{s^2}$$
C.
$$\left( {n - 2} \right){f^{0 - 14}}\left( {n - 1} \right){d^{10}}n{s^2}$$
D.
$$\left( {n - 2} \right){d^{0 - 1}}\left( {n - 1} \right){f^{1 - 14}}n{s^2}$$
Answer :
$$\left( {n - 2} \right){f^{1 - 14}}\left( {n - 1} \right){s^2}{p^6}{d^{0 - 1}}n{s^2}$$
Solution :
In lanthanides ( at. no. of elements 57 to 71 ) the electronic configuration of outermost shells are $$\left( {n - 2} \right){f^{1 - 14}}\left( {n - 1} \right){s^2}{p^6}{d^{0\,\,{\text{to}}\,\,1}}n{s^2}.$$