Lectures and recitations dealing with the principles of chemistry. First term: Chemical bonding-electronic structure of atoms, periodic properties, ionic substances, covalent bonding, Lewis representations of molecules and ions, shapes of molecules, Lewis acids and bases, Bronsted acids and bases, hybridization and resonance, bonding in solids. Second term: Chemical dynamics-spectroscopy, thermodynamics, kinetics, chemical equilibria, electrochemistry, and introduction to organic chemistry. Graded pass/fail.