atomic number 37 vs Rb

atomic number 37 and Rb both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 37	Yes	No	No	No
Rb	Yes	No	No	No

As nouns, atomic number 37 and Rb are synonyms defined as:

atomic number 37 and Rb: a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite

Other synonyms of atomic number 37 include rubidium.

atomic number 37 (noun)	Rb (noun)
a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite	a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite