atomic number 87

1. 1.

   a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

   SynonymsfranciumFr

   Broadermetallic element

Questions about atomic number 87

What does atomic number 87 mean?

atomic number 87 means "a radioactive element of the alkali-metal group discovered as a disintegration product of actinium".

What is another word for atomic number 87?

Close synonyms include francium, Fr. 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 87 a common word?

atomic number 87 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.