Atomic Structure and Electron Configuration
Start with the big picture
Electrons are described by four quantum numbers and occupy orbitals according to the Pauli exclusion, Aufbau, and Hund principles. Electron configurations help identify valence electrons, while effective nuclear charge and electronegativity trends explain changes in atomic properties and bond polarity. The topic extends these ideas to ionic size, hybridization, and the difference between sigma and pi bonds. It also introduces formal charge, resonance, and inductive effects as ways to assess electron distribution and stabilization. These concepts support comparisons of acidity and basicity, including the relationship between conjugate-pair strength, pKₐ, and hybridization. Together, they link atomic-level structure with molecular bonding and reactivity.
What you'll learn
- Interpret the four quantum numbers and describe their role in specifying electron states.
- Apply orbital-filling principles to explain electron configurations and identify valence electrons.
- Relate periodic trends, hybridization, and bond types to molecular properties.
- Use formal charge, resonance, and inductive effects to assess electron distribution.
- Compare acid–base strength using conjugate pairs, pKₐ, and hybridization.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
