Physical description and computations of chemical reactions and photochemistry with applications in air pollution, planetary atmospheres and condensed phases. Topics include: kinetic modeling, time-dependent quantum mechanics, rate constants, transition state theory intermolecular potentials, classical two-body elastic scattering, reactive scattering, nonadiabatic processes, statistical theories of unimolecular reactions, photochemistry, laser and molecular beam methods, theory of electron transfer, solvent effects, condensed phase dynamics, surface reactions, isotope effects.