electron shell vs group

electron shell and group both are nouns.

Word	Noun	Adjective	Verb	Adverb
electron shell	Yes	No	No	No
group	Yes	No	Yes	No

As nouns, group is a hypernym of electron shell; that is, group is a word with a broader meaning than electron shell:

Other hypernyms of electron shell include grouping.

electron shell (noun)	group (noun)
a grouping of electrons surrounding the nucleus of an atom	any number of entities (members) considered as a unit
	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

electron shell (verb)	group (verb)
	arrange into a group or groups
	form a group or group together