Al vs atomic number 13

Al and atomic number 13 both are nouns.

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

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

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

Other synonyms of Al include aluminium, aluminum.

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