KEY CONCEPTS: Always refer to the original form of the polyatomic ion.

From the original form: _____ate ion, if:
i.) you gain an oxygen, name changes to per____ate ion.
ii.) lose 1 oxygen, name changes to _____ite ion.
iii.) lose 2 oxygens, name changes to hypo____ite ion.

**NOTE: the charge of the polyatomic NEVER changes