Answer:
C polyatomic ions are made up of more than one atoms. The correct options are,
Step-by-step explanation:
Polyatomic ions have many charges.
Polyatomic ions attract other ions to form ionic bonds.
Polyatomic ions are made up of two or more types of atoms.
Polyatomic ion:
They are also known as a molecular ion, It is an ion composed of two or more covalently bonded atoms.
They have extra or lesser electrons than they need.
They are charged hence they attract opposite one.
For example-
Therefore, C polyatomic ions are made up of more than one atoms.