atomic number 57

1. 1.

   a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth

   SynonymslanthanumLa

   Broadermetallic element

Questions about atomic number 57

What does atomic number 57 mean?

atomic number 57 means "a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth".

What is another word for atomic number 57?

Close synonyms include lanthanum, La. 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.

Is atomic number 57 a common word?

atomic number 57 is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.