tantalum vs atomic number 73

tantalum and atomic number 73 both are nouns.

Word	Noun	Adjective	Verb	Adverb
tantalum	Yes	No	No	No
atomic number 73	Yes	No	No	No

As nouns, tantalum and atomic number 73 are synonyms defined as:

tantalum and atomic number 73: a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite

Other synonyms of tantalum include Ta.

tantalum (noun)	atomic number 73 (noun)
a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite	a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite