atomic number 85 vs At

atomic number 85 and At both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 85	Yes	No	No	No
At	Yes	No	No	No

As nouns, atomic number 85 and At are synonyms defined as:

atomic number 85 and At: a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium

Other synonyms of atomic number 85 include astatine.

atomic number 85 (noun)	At (noun)
a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium	a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium