atomic number 24 vs Cr

atomic number 24 and Cr both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 24	Yes	No	No	No
Cr	Yes	No	No	No

As nouns, atomic number 24 and Cr are synonyms defined as:

atomic number 24 and Cr: a hard brittle multivalent metallic element; resistant to corrosion and tarnishing

Other synonyms of atomic number 24 include chromium.

atomic number 24 (noun)	Cr (noun)
a hard brittle multivalent metallic element; resistant to corrosion and tarnishing	a hard brittle multivalent metallic element; resistant to corrosion and tarnishing