aluminum vs atomic number 13

aluminum and atomic number 13 both are nouns.

Word	Noun	Adjective	Verb	Adverb
aluminum	Yes	No	No	No
atomic number 13	Yes	No	No	No

As nouns, aluminum and atomic number 13 are synonyms defined as:

aluminum and atomic number 13: a silvery ductile metallic element found primarily in bauxite

Other synonyms of aluminum include Al, aluminium.

aluminum (noun)	atomic number 13 (noun)
a silvery ductile metallic element found primarily in bauxite	a silvery ductile metallic element found primarily in bauxite