uranium 235 vs uranium

uranium 235 and uranium both are nouns.

Word	Noun	Adjective	Verb	Adverb
uranium 235	Yes	No	No	No
uranium	Yes	No	No	No

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

uranium 235: a uranium isotope with mass number 235; capable of sustaining chain reactions
uranium: 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 atomic number 92, U.

uranium 235 (noun)	uranium (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