title: Chemical bonding: from Lewis to atoms in molecules.
abstract: The Lewis electron pair concept and its role in bonding are recovered in the properties of the electron pair density and in the topology of the Laplacian of the electron density. These properties provide a bridge with the quantum mechanical description of bonding determined by the Feynman, Ehrenfest, and virial theorems, bonding being a consequence of the electrostatic forces acting within a molecular system.
authors.affiliation: Department of Chemistry, McMaster University, Hamilton, Ontario L8S 4M1, Canada. bader@mcmaster.ca
authors.forename: R F W
authors.initials: RF
authors.lastname: Bader
authors.forename: J
authors.initials: J
authors.lastname: Hernández-Trujillo
authors.forename: F
authors.initials: F
authors.lastname: Cortés-Guzmán