This focused section covers intermolecular forces (IMFs)—the key attractive interactions that determine how molecules behave in the condensed phases. It starts by reviewing molecular polarity, helping students recognize when a molecule has a dipole moment based on structure and electronegativity. The notes then clearly explain the three main types of IMFs: dispersion forces (present in all substances), dipole-dipole interactions (in polar molecules), and hydrogen bonding (in molecules with H b...