Which of the following elements are analogous to the lanthanides?

$Ce$ $(Z=58)$ is a member of

Determine whether the following statements are True $(T)$ or False $(F)$:
$(a)$ Actinoid contraction increases from one element to the next.
$(b)$ Actinoid contraction decreases from one element to the next.
$(c)$ Lanthanoid contraction occurs,but actinoid contraction does not occur.

Which among the following properties of lanthanoids is $NOT$ true?

The electronic configuration for Neodymium is: (Atomic Number for Neodymium $60$)

Write a reaction with lanthanoids $(Ln)$: