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Naming Ionic Compounds. 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!. Oxyanions.
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Naming Ionic Compounds • 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!
Oxyanions • 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: Nitrate vs. Nitrite
LiF • Lithium fluoride • Na2O • Sodium oxide • KOH • Potassium hydroxide
Transition Metals • 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.
Mixed Practice • KBr • CuCO3 • NaOH • CuBr • Fe2O3
Write the formula: • Potassium carbonate • Iron (III) chloride • Barium hydroxide