Dmitri Ivanovich Mendeleev vs chemist

Dmitri Ivanovich Mendeleev and chemist both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dmitri Ivanovich Mendeleev	Yes	No	No	No
chemist	Yes	No	No	No

Dmitri Ivanovich Mendeleev (noun)	chemist (noun)
Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)	a scientist who specializes in chemistry
	a health professional trained in the art of preparing and dispensing drugs