Question

Do lanthanides have a group number?

Answer 1

Lanthanides:

1. Lanthanides are the $15$ chemical elements that belong to the f-block in the periodic table.
2. These elements are very reactive and have high melting and boiling points.
3. Lanthanides are placed in group $3$ and $6$th period.
4. So lanthanides do have a group number.