Question

the polyatomic ion which does not containing five atoms is​

Answer 1

Explanation:

A molecular ion is a covalently bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero. Unlike a molecule, which has a net charge of zero, this chemical species is an ion. (The prefix poly- carries the meaning "many" in Greek, but even ions of two atoms are commonly described as polyatomic.)

Answer 2

Answer:

H3O+,CN-,NO3- ,OH- AND CLO4