atomic number 87 vs Fr

atomic number 87 and Fr both are nouns.

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

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

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

Other synonyms of atomic number 87 include francium.

atomic number 87 (noun)	Fr (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