Question

why Lanthanides are called rare earth's ​

Answer 1

ANSWER :

The elements scandium and yttrium are also known as the “rare earths” because they were originally discovered together with the lanthanides in rare minerals and isolated as oxides, or “earths.” Collectively, these metals are also called rare earth elements (REEs).

Answer 2

Answer:

because they were originally discovered together with the lanthanide in rare minerals and isolated as oxide, or earth

collectively, these metals are also called rare earth elements