Electronic Configuration of Lanthanoids

The electronic configuration of gadolinium (At. No. $64$) is

The third ionization enthalpy is expected to be very low for

Among the lanthanide $\mathrm{Eu}, \mathrm{Tb}, \mathrm{Er}$ and $\mathrm{Dy}$, which one readily forms stable divalent ions?

Gadolinium $\left(\mathrm{Gd}\right)$ has $4{\mathrm{f}}^{7}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$ electronic configuration outside the $\left[\mathrm{Xe}\right]$ core. Find spin magnetic moment of ${\mathrm{Gd}}^{3+}$

The number of f-electrons in ${\mathrm{Ho}}^{2+}$ ion is ______.
$\text{ [At. no. of Ho }=67]$

The electronic configuration for Neodymium is:

[Atomic Number for Neodymium 60]

What is the valence shell electronic configuration of Neodymium?

Choose the stable oxidation states of cerium ($\mathrm{Ce}$).

The electronic configurations of bivalent europium and trivalent cerium are respectively
(atomic number: $\mathrm{X}\mathrm{e}=54,\mathrm{C}\mathrm{e}=58,\mathrm{E}\mathrm{u}=63$ )

The atomic number of cerium $\left(Ce\right)$ is 58. The correct electronic configuration of $C{e}^{3+}$ ion is

Electronic configuration of Gd (64) is written as

The elements with atomic numbers 57 to 71 are called

Which of the following has got incompletely filled $f$-subshell?

The outer electronic configuration of $\mathrm{Gd}$ $(\text{Atomic number}=64)$ is -

Select the correct statements from the following.

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