The noble gases are inert (unreactive) because they have a full outer shell of electrons.
https://sp.outletdastintas.com.br/
https://pkmmuka.cianjurkab.go.id/
https://collegiogeometri.mb.it/
https://personal.cofadena.gob.bo/
The noble gases are inert (unreactive) because they have a full outer shell of electrons.