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There are two types of compounds: molecular and ionic. ill give you an example of each Water-H20 molecular compound Salt-NaCl ionic compound. There are ionic compounds which is a compound formed by a positive metal ion and a negative nonmetal ion.
Type 1 binary ionic compounds are those in which the cation has only one form, or charge. Type 2 binary ionic compounds are those in which the cation can have multiple forms. 1. The cation (which is a metal in most cases) is listed first and the anion (which is a nonmetal in most cases) second.