atomic number 42 vs molybdenum

atomic number 42 and molybdenum both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 42	Yes	No	No	No
molybdenum	Yes	No	No	No

As nouns, atomic number 42 and molybdenum are synonyms defined as:

atomic number 42 and molybdenum: a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel

Other synonyms of atomic number 42 include Mo.

atomic number 42 (noun)	molybdenum (noun)
a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel	a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel