Covalent Bonds and Lewis Structures 3

This video extends the Lewis‑structure and molecular‑geometry series by introducing a systematic approach to understanding bond polarity and molecular polarity. Beginning with atom‑atom dipoles, the lesson explains how electronegativity differences create directional bond dipoles and how these dipoles combine through vector addition to determine the polarity of an entire molecule. Several key molecules—water, carbon dioxide, and ammonia—are analyzed in detail. Each example demonstrates how molecular geometry and dipole orientation work together to produce either a polar or nonpolar molecule, reinforcing the connection between structure and chemical behavior. By the end of the lesson, viewers will understand how to evaluate polarity using Lewis structures, electronegativity, and vector reasoning, providing a strong conceptual foundation for topics such as intermolecular forces, solubility, and molecular interactions. This video is ideal for General Chemistry students, instructors seeking supplemental material, and anyone wanting a deeper conceptual understanding of molecular polarity and structural analysis.