The outer electronic configuration of Gd (Atomic No: 64) is:

Q. The outer electronic configuration of $Gd$ (Atomic No:64) is:

Q. The outer electron configuration of Gd (Atomic No. 64) is :

Q. The outer shell electronic configuration of $Gd(Z=64)$ is

Q. The electronic configuration of ${Gd}^{2+}$ is (atomic number of $Gd$ is $64$) :

Q. The electronic configurations of $Eu$ (Atomic No.63) $Gd$ Atomic No. 64) and $Tb$ (Atomic No. 65) are :