Polyatomic Ion:A charged particle which has two or more atoms held together by covalent bonds, like the Iodite Ion.
Oxidation State/Number: The condition of an atom expressed by the number of electrons that it appears to have lost or gained, which would be -1 for Iodite Ion.
Covalent Bonding: The type of bond where electrons are shared between atoms; this occurs in polyatomic ions like Iodite Ion.