atomic number 25 vs Mn

atomic number 25 and Mn both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 25	Yes	No	No	No
Mn	Yes	No	No	No

As nouns, atomic number 25 and Mn are synonyms defined as:

atomic number 25 and Mn: a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals

Other synonyms of atomic number 25 include manganese.

atomic number 25 (noun)	Mn (noun)
a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals	a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals