atomic number 36 vs inert gas

atomic number 36 and inert gas both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 36	Yes	No	No	No
inert gas	Yes	No	No	No

As nouns, inert gas is a hypernym of atomic number 36; that is, inert gas is a word with a broader meaning than atomic number 36:

atomic number 36: a colorless element that is one of the six inert gasses; occurs in trace amounts in air
inert gas: any of the chemically inert gaseous elements of the helium group in the periodic table

Other hypernyms of atomic number 36 include argonon, noble gas.

atomic number 36 (noun)	inert gas (noun)
a colorless element that is one of the six inert gasses; occurs in trace amounts in air	any of the chemically inert gaseous elements of the helium group in the periodic table