Chapter 1: A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Electronegativity differences between atoms are explored as predictors of bond character and polarity, while formal charge calculations are introduced as tools for assessing electron distribution in molecular structures. The chapter explains hybridization theory through the sp³, sp², and sp orbital models, demonstrating how orbitals combine to create bonding frameworks that determine molecular geometry. Valence shell electron pair repulsion theory is applied to visualize three-dimensional molecular shapes and predict spatial arrangements of atoms. Resonance structures are presented as a way to represent delocalized electron systems that cannot be adequately described by a single Lewis structure. Polarity at both the bond and molecular levels is connected to intermolecular forces, illustrating how these interactions influence physical properties and chemical behavior. The role of functional groups in organic molecules is introduced, showing how specific arrangements of atoms create characteristic chemical reactivity patterns. Throughout the chapter, electron behavior and orbital interactions are emphasized as the underlying cause of molecular reactivity, establishing the mechanistic foundation necessary for understanding organic reactions. This review bridges the conceptual gap between general chemistry principles and the more complex applications specific to organic chemistry, ensuring that students possess the prerequisite knowledge needed to successfully engage with advanced topics in synthesis, mechanism, and molecular analysis.