Quantum chemistry 155 Chemistry 27 QUANTUM CHEMISTRY 25 Quantum Chemistry 18 Quantum theory 13 Molecules 10 Quantum mechanics 10 Molecular structure 7 Chemical bonds 6 Chemistry, Physical and theoretical 6 Crystallography 6 Molecular orbitals 5 FUNDAMENTALS OF QUANTUM CHEMISTRY 4 Hydrogen atom 4 Physical chemistry 4 Wave mechanics 4 Atoms 3 ELEMENTARY QUANTUM CHEMISTRY 3 Spectroscopy 3 Angular momentum 2 Computational chemistry 2 Density functionals 2 Electronic structure 2 HANDBOOK OF COMPUTATIONAL QUANTUM CHEMISTRY 2 INTRODUCTION TO QUANTUM CHEMISTRY 2 Many-body problem 2 Mathematics 2 Molecular Structure 2 Molecular dynamics 2 Molecular spectroscopy 2