uranium 235 vs atomic number 92

uranium 235 and atomic number 92 both are nouns.

Word	Noun	Adjective	Verb	Adverb
uranium 235	Yes	No	No	No
atomic number 92	Yes	No	No	No

As nouns, atomic number 92 is a hypernym of uranium 235; that is, atomic number 92 is a word with a broader meaning than uranium 235:

uranium 235: a uranium isotope with mass number 235; capable of sustaining chain reactions
atomic number 92: a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons

Other hypernyms of uranium 235 include U, uranium.

uranium 235 (noun)	atomic number 92 (noun)
a uranium isotope with mass number 235; capable of sustaining chain reactions	a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons