Question

How many elements belong to lanthanoid series?

Answer 1

Lanthanide Series

1. In the periodic table, along the bottom of the periodic table of elements, there are two rows ,first represent the lanthanides.
2. The lanthanide series is usually combined with lanthanum and this series be comprised of $14$ elements.
3. The elements are: Lanthanum ($\mathrm{La}$),Cerium ($\mathrm{Ce}$),Praseodymium ($\mathrm{Pr}$),Neodymium ($\mathrm{Nd}$),Promethium ($\mathrm{Pm}$),Samarium ($\mathrm{Sm}$),Europium ($\mathrm{Eu}$),Gadolinium ($\mathrm{Gd}$),Terbium ($\mathrm{Tb}$),,Dysprosium ($\mathrm{Dy}$),Holmium ($\mathrm{Ho}$),Erbium ($\mathrm{Er}$),Thulium ($\mathrm{Tm}$),Ytterbium ($\mathrm{Yb}$),Lutetium ($\mathrm{Lu}$).

Therefore, Lanthanoid series consists of $14$ elements.