Which type of elements are lanthanides and actinides part of? halogens inner transition metals metals noble gases

Elements: Gadolinium; Lutetium; Cerium

Explanation:

The lanthanide and actinide series make up the inner transition metals. The lanthanide series includes elements 58 to 71, which fill their 4f sublevel progressively. The actinides are elements 89 to 103 and fill their 5f sublevel progressively.

Inner transition metals