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Naming Ionic Compounds Guide

Learn rules for naming ionic compounds, including cations, anions, oxyanions, transition metals, and mixed practice examples. Understand how to name compounds correctly with detailed explanations.

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Naming Ionic Compounds Guide

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  1. 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!

  2. 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

  3. LiF • Lithium fluoride • Na2O • Sodium oxide • KOH • Potassium hydroxide

  4. 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.

  5. FeO

  6. CrCl2

  7. MnO2

  8. Mixed Practice • KBr • CuCO3 • NaOH • CuBr • Fe2O3

  9. Write the formula: • Potassium carbonate • Iron (III) chloride • Barium hydroxide

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