5.1: Ionic Compounds 5.1.1: Ions 5.1.2: Ions and the Octet Rule 5.1.3: Ions of Some Common Elements 5.1.4: Periodic Properties and Ion Formation 5.1.5: Naming Monoatomic Ions 5.1.6: Polyatomic Ions 5.1.7: Ionic Bonds 5.1.8: Formulas of Ionic Compounds 5.1.9: Naming Ionic Compounds 5.1.10: Some Properties of Ionic Compounds 5.1.11: H⁺ and OH⁻ Ions - An Introduction to Acids and Bases 5.2: Molecular Compounds A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges, either between electrons and nuclei, or as the result of a dipole attraction. All bonds can be explained by quantum theory, but, in practice, simplification rules allow chemists to predict the strength, directionality, and polarity of bonds. 5.2.1: Covalent Bonds 5.2.2: Covalent Bonds and the Periodic Table 5.2.3: Multiple Covalent Bonds 5.2.4: Characteristics of Molecular Compounds 5.2.5: Molecular Formulas and Lewis Structures 5.2.6: Drawing Lewis Structures 5.2.7: The Shapes of Molecules 5.2.8: Polar Covalent Bonds and Electronegativity 5.2.9: Polar Molecules 5.2.10: Naming Binary Molecular Compounds 5.3: Chemical Bonding (Worksheet) Chemical bonds are the attractive forces that hold atoms together in the form of compounds. A chemical bond is formed when electrons are shared between two atoms. There are three types of bonds: covalent bonds, polar covalent bonds and ionic bonds.