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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 four primary categories of organic compounds are: Carbohydrates, lipids, proteins, nucleotides and nucleic acids. Discuss why carbon is useful forming biological molecules. Carbon has only 4 valence electrons, they bond readily to gain more valence electrons.