Ionic Nomenclature & Compounds

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Ionic NomenclatureKomperda

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Rules for FormulasAll atoms must achieve stable electron

configuration (full valence)

The formula must be electrically neutralThe sum of the positive and negative charges

must equal zero

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How do we name our formulas?

Name the cation first, then the anion

Do not include the numbers in the name

Example:

BaCl2 = Barium Chloride

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Transition MetalsForm more than one type of cation

Must use Roman Numerals to distinguish which cation is in the formula

Roman Numerals are ONLY used in the NAME, not in the formula

The Roman Numeral stands for the charge on the cation, NOT THE SUBSCRIPT in the formula

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Formula vs. Name

FeN = Iron (III) Nitride

Cu2O = Copper (I) Oxide

SnO = Tin (II) Oxide

SnO2 = Tin (IV) Oxide

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How do I figure out what to name it?

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What do Ionic Compounds look like?

Ionic compounds form salts

Think of table salt

Cations are smaller than the parent atom

Anions are bigger than the parent atom

The compounds formed become tightly packed spheres of atoms

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Sizes of Ions

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KomperdaThe Positions of the Centers of the atoms form

a matrix

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ReviewSimple Binary Ionic Compounds use the simple

names of the ions

Transition Metals with more than one charge use Roman Numerals in the name, not in the formula

Names and formulas are cation first, then the name of the anion