Question

One among the lanthanoids, $Ce\left(III\right)$ can be easily oxidised to $Ce\left(IV\right)$. Explain.

Answer 1

Electronic configuration of $Ce$ is $4f^{1}5d^{1}6s^2.$

$Ce\left(III\right)$ habing the configuration of $4f^{1}5d^{0}6s^0.$

Can easily loose electron to acquire $4f^{0}5d^{0}6s^0$

Stable configuration and form $Ce\left(IV\right).$