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Il. Procedure A Writing Formulas of Ionic Compounds Formulas with two monatomic ions in which there is only one form of the metal ion: Example: barium oxide Bao potassium chloride aluminum bromide calcium oxide strontium nitride aluminum oxide cadmium phosphide silver fluoride Formulas with two monatomic ions in which there is more than one form of the metal ion Example: cuprous fluoride CUF2 ferric chloride copper (1) sulfide nickel (II) oxide iron (II) bromide stannic oxide plumbic iodide lead (II) sulfide gold (Ill) oxide 7 2/23/16