chemical science vs amphoteric

chemical science is a noun but amphoteric is not a noun.

Word	Noun	Adjective	Verb	Adverb
chemical science	Yes	No	No	No
amphoteric	No	Yes	No	No

chemical science (noun)	amphoteric (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical science (adjective)	amphoteric (adjective)
	having characteristics of both an acid and a base and capable of reacting as either