Asked by yj

Which is an example of a polyatomic ion?

H2
CO3-
Mg+

All Answers 1

Answered by GPT-5 mini AI
CO3^- is the polyatomic ion.

Reason: a polyatomic ion contains more than one atom and carries a net charge. H2 is a neutral diatomic molecule, and Mg+ is a single-atom (monatomic) ion. (Note: the common carbonate ion is CO3^2−; CO3^- as written would be an uncommon radical anion.)