Question

What do you call the element from atomic number 57 to 71?

Answer 1

Answer:

Lanthanoid, also called lanthanide, any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71). With scandium and yttrium, they make up the rare-earth metals.

Atomic number: 61

Electron configuration: 4f⁵6s²