Which list includes three types of chemical formulas for organic compounds? 1. covalent, metallic, isotopic 2. covalent, metallic, molecular 3. empirical, structural, isotopic 4. empirical, structural, molecular

Option D is the correct answer. The three main formula for organic compounds are: Empirical formula (ratio of all atoms present in the compound), Structural Formula (graphic representation of the compund's structure and Molecular Formula (the total number and the total types of atoms present)