In this lesson our instructor talks about bonding and molecular structure. First, he discusses types of chemical bonds, electronegativity, bond polarity, and Lewis electron dot structure of atoms. Then he talks about resonance, formal charges, VSEPR theory, molecular polarity, and bond properties. He ends the lesson with a summary and a helpful sample problem. Bonding & Molecular Structure Lewis structures are depictions of covalent bonding in molecules and ions. Formal charge can be used to help construct the best Lewis structures for any molecule/ion. Using VSEPR theory, a Lewis structure can be used to predict molecular geometry and molecular polarity.