Question

What are lanthanides?
What are actinides?​

Answer 1

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$\bf \underline{Lanthanoids}$

Lanthanoids, also called lanthanides are 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71)

$\bf \underline{Actinoid}$

Actinoid element, also called actinide element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103).

Answer 2

Answer:

Explanation:

Lanthanoids, also called lanthanides are 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71)

Actinoid element, also called actinide element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103).