electrostatic energy gain / metal / energy contribution / energy gain / electricity / energy balance / potential energy curve / net energy cost / kinetic energy / energy cost / kinetic energy contribution / energy change / energy lowering / exchange energy / potential energy / ground-state energy / transition metal / chemical bonding / ionization energy / ground-state energy eigenvalues / energy difference / lowest energy / energy contributions / electron energy / lattice energy / cohesive energy / energy / /