Question

What are lanthanides and actinides called?

Answer 1

Answer:

The lanthanides and actinides together are sometimes called the inner transition elements.

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). As a group, they are significant largely because of their radioactivity.

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. ... These elements are also called the lanthanide elements.

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