Question #f6f94

1 Answer

An oxyion is a negatively charged polyatomic ion that contains one or more oxygen atoms.

Oxyions are anions because of their negative charge. Oxyanions are salts of oxygen-containing acids. Examples are:

Carbonate ion, CO₃²⁻ from carbonic acid, H₂CO₃

Chlorate ion, ClO₃⁻ from chloric acid, HClO₃

Iodate ion, IO₃⁻ from iodic acid, HIO₃

Nitrate ion, NO₃⁻ from HNO₃

Phosphate ion, PO₄³⁻ from phosphoric acid, H₃PO

Sulfate ion, SO₄²⁻, from sulfuric acid, H₂SO₄

You can find a much longer list of oxyanions at

http://socratic.org/questions/how-are-polyatomic-ions-different-from-simple-anions