Ionic Compounds: Naming

First Step in Naming Find metal If metal has only one oxidation state it’s easy If metal has more than one oxidation state, there’s an extra step

Naming Binary Ionic Compounds 1.Always name metal (+ ion) first stem 2. Write stem nonmetal (- ion) 3. Add ending “ide” to nonmetal

Hydrogen = hydr Nitrogen = nitr Oxygen = ox Fluorine = fluor Chlorine = chlor Bromide = brom Iodide = iod Phosphorus = phosph Sulfur = sulf Tellurium = tellur Sellenium = selen Arsenic = arsen

Metals with one oxidation state CaO BaS AlN LiCl Al 2 Se 3 Na 2 O K 3 N MgF 2 Calcium Oxide Barium Sulfide Aluminum Nitride Lithium Chloride Aluminum Selenide Sodium Oxide Potassium Nitride Magnesium Fluoride

Metals with > 1 oxidation state Use formula to figure out oxidation state metalUse formula to figure out oxidation state metal orEx: Fe can be Fe +2 or Fe +3 Name FeO and Fe 2 O 3 – 2 different – 2 different compounds – cannot name both iron oxide – every formula has 1 name only

FeO and Fe 2 O 3 Compounds are electrically neutral Oxygen is -2 FeO Name: Iron (II) oxide (II = 2 for + 2 charge on Fe) 1 O (-2) so Fe must be +2 so Fe must be +2

FeO and Fe 2 O 3 Fe 2 O 3 O is -2 3 O’s [3 x (-2) = -6] total negative charge Total positive charge must be +6 So each Fe is +3 Iron (III) oxide

TiCl 3 Mn 2 O 4 Co 2 O 3 PdBr 2 AuCl 3 MoN MnO TiO Titanium (III) chloride Manganese (IV) oxide Cobalt (III) oxide Palladium (II) bromide Gold (III) chloride Molybdenum (III) nitride Manganese (II) oxide Titanium (II) oxide

Summary for Binary Ionic Compounds Formula: positive first, always metal > 1 oxidation state, name needs roman numeral Name = metal + stem nonmetal + ide