Chemistry 292 Physical chemistry 192 Quantum chemistry 135 Chemistry, Physical and theoretical 127 PHYSICAL CHEMISTRY 105 Electrochemistry 93 Radiochemistry 83 Thermodynamics 70 Theoretical chemistry 68 Solid state chemistry 57 Catalysis 52 Surface chemistry 48 Photochemistry 47 Biochemistry 42 Chemical kinetics 42 Molecular structure 41 Isotopes 40 Nuclear chemistry 40 Physical Chemistry 37 Chemical bonds 35 Molecular spectroscopy 34 Molecules 30 Physical 27 Thermochemistry 26 Chemical reactions 25 QUANTUM CHEMISTRY 25 ANNUAL REVIEW OF PHYSICAL CHEMISTRY 22 Molecular theory 22 Coordination compounds 21 PRINCIPLES OF PHYSICAL CHEMISTRY 21