Unit Objectives Explain the formation of cations, anions, and ionic compounds Predict the charge of common metallic and nonmetallic elements, and write their electron configurations Describe the formation of covalent bonds Define electronegativity and assess the polarity of covalent bonds Write Lewis symbols for neutral atoms and ions Draw Lewis structures depicting the bonding in simple molecules Compute formal charges for atoms in any Lewis structure Use formal charges to identify the most reasonable Lewis structure for a given molecule Identify the oxidation states of atoms in Lewis structures 3.3.0: Bond Types 3.3.0.0: Bond Types (Problems) 3.3.1: Lewis Dot Diagrams 3.3.1.0: Lewis Dot Diagrams (Problems) 3.3.2: Lewis Structures 3.3.2.0: Lewis Structures (Problems) 3.3.3: Formal Charge and Oxidation State 3.3.3.0: Formal Charge and Oxidation State (Problems)