group vs chemical science

group and chemical science both are nouns.

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

group (noun)	chemical science (noun)
any number of entities (members) considered as a unit	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
a set that is closed, associative, has an identity element and every element has an inverse
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

group (verb)	chemical science (verb)
arrange into a group or groups
form a group or group together