 Write cation first. Never change anything about the cation’s name!  Write anion second. Change ending to - ide.  Exception: Polyatomic ions’ names never change! Leave them alone!

 A polyatomic ion composed of an element (nonmetal usually) bonded to one or more oxygen atoms  The ion with more O atoms is named using the root of the nonmetal plus –ate  The ion with fewer O atoms is named using the root of the nonmetal plus –ite  Ex: Nitratevs.Nitrite

 LiF  Lithium fluoride  Na 2 O  Sodium oxide  KOH  Potassium hydroxide

 If the cation is a transition metal, it can have multiple charges.  Figure out the charge by reversing the criss cross method.  Write the oxidation number as a Roman numeral after its name.

 FeO

 CrCl 2

 MnO 2

 KBr  CuCO 3  NaOH  CuBr  Fe 2 O 3

 Potassium carbonate  Iron (III) chloride  Barium hydroxide