univalent vs chemical science

univalent is not a noun while chemical science is a noun.

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

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

univalent (adjective)	chemical science (adjective)
used of a chromosome that is not paired or united with its homologous chromosome during synapsis
having a valence of 1