Periodic Trends: Electron Affinity and Electronegativity

Chemical properties are dictated by the arrangement of electrons within an atom. Understanding how electron affinity and electronegativity vary across the periodic table is essential for mastering general chemistry and predicting reactivity. This text-based course provides a rigorous foundation in the electronic structure of atoms, enabling you to interpret periodic trends, calculate bond polarity, and confidently predict the reactivity and stability of compounds. What you'll learn: * **Understand** the principles of electronic configuration, including the Aufbau principle and Hund's rule, and how they define an atom's potential for interaction. * **Define** and differentiate between ionization energy, electron affinity, and electronegativity, focusing on the key factors that influence their magnitude. * **Analyze** periodic trends for atomic radius, electron affinity, and electronegativity, identifying exceptions and their underlying quantum mechanical explanations. * **Apply** the concepts of electronegativity (using scales like Pauling) to determine the polarity and ionic character of chemical bonds. * **Practice** interpreting chemical behavior by relating changes in electronic properties to an element’s position within the periodic structure. We begin with a deep dive into atomic structure and electron arrangement, then systematically explore the definitions and influences governing key periodic properties. The course concludes by applying these trends to predict fundamental chemical reactions and bonding characteristics. This course is designed for absolute beginners in chemistry or those needing a solid conceptual refresher. No prior knowledge of advanced chemistry is required. Start building your mastery of chemical principles today through clear, written explanations and focused examples.