atomic number 21

1. 1.

   a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite

   SynonymsscandiumSc

   Broadermetallic element

Questions about atomic number 21

What does atomic number 21 mean?

atomic number 21 means "a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite".

What is another word for atomic number 21?

Close synonyms include scandium, Sc. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.