Br vs atomic number 35

Br and atomic number 35 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Br	Yes	No	No	No
atomic number 35	Yes	No	No	No

As nouns, Br and atomic number 35 are synonyms defined as:

Br and atomic number 35: a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water

Other synonyms of Br include bromine.

Br (noun)	atomic number 35 (noun)
a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water	a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water