What makes a ployatomic ion different from other ions?

A polyatomic ion differs from other ions in that it consists of two or more atoms bonded together, which collectively carry a net charge. In contrast, monatomic ions are composed of a single atom with a positive or negative charge. Polyatomic ions often contain a central atom, usually a nonmetal, surrounded by other atoms, including oxygen, forming various structures such as sulfate (SO₄²⁻) or nitrate (NO₃⁻). This complexity allows polyatomic ions to participate in a wider range of chemical reactions and form more intricate compounds.