Chemistry - f-block Question with Solution | TestHub

The electronic configuration of$\text{Ce}$is:

$\mathrm{C}\mathrm{e}\mathrm{ }:\left[\mathrm{X}\mathrm{e}\right]\mathrm{ }4{\mathrm{f}}^1\mathrm{ }5{\mathrm{d}}^1\mathrm{ }6{\mathrm{s}}^2$

The most common oxidation states shown by cerium are$\text{+3}$and$\text{+4}$.

As energy difference between 4f and 5d-orbitals is very less, so electrons of f-orbitals also take part in bond formation