7.3 Names and formulas for Ionic Compounds

7.3 NAMES AND FORMULAS FOR IONIC COMPOUNDS . FORMULAS FOR IONIC COMPOUNDS A formula unit represents the simplest ratio of the ions involved in an ionic compound. • For example, MgCl 2 means that the ions exist in a 1:2 ratio. • The formula unit contains one Mg2+ and two CL-ions. ................
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