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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.
The most common examples of such compounds are soaps and detergents, four of which are shown below. Note that each of these molecules has a nonpolar hydrocarbon chain, the tail, and a polar (often ionic) head group.