Fr vs atomic number 87

Fr and atomic number 87 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fr	Yes	No	No	No
atomic number 87	Yes	No	No	No

As nouns, Fr and atomic number 87 are synonyms defined as:

Fr and atomic number 87: a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

Other synonyms of Fr include francium.

Fr (noun)	atomic number 87 (noun)
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium	a radioactive element of the alkali-metal group discovered as a disintegration product of actinium