what is the difference in diatomic and polyatomic molecules
Best Answer: Polyatomic: The only difference between a polyatomic ion and a normal ion is that a polyatomic ion is composed of more than one elements. The elements are chemically bonded and have an overall net charge like a normal ion.
Diatomic molecules   Diatomic molecules are molecules composed of two atoms (di meaning 2 and atomic for atoms) of the same or of different elements. All the elementâ¦al gases like hydrogen, nitrogen, oxygen, fluorine, chlorine, etc., form diatomic molecules - except the inert gases, of course.