Question

what is formed when polyatomic ions bond with other ions?
ionic compounds
neutral compounds
ionic elements
neutral elements

Explanation:

Polyatomic ions are charged groups of atoms. When they bond with other ions (which are also charged), they form ionic compounds. Ionic compounds are formed by the electrostatic attraction between positive and negative ions. Neutral compounds don't exist in this context as ions have charges. Elements are pure substances with only one type of atom and don't form from ion - ion bonding in this way.

Answer:

ionic compounds