For 10 points, name this value which, via Coloumb's law, determines how strongly electrons are bound to an atom.
This parameter is varied in Hartree-Fock methods to improve numerical stability, at first increased and then slowly reduced to its correct values as orbitals begin to converge. A set of equations used to correct this quantity were motivated by the trial wavefunction psi proportional to the negative exponential of an effective value for this quantity minus s. That set of equations were semi-empirically derived by Slater and can be used to find these values for use in the Allred-Rochow form of electronegativity, which assumes that this value decreases due to the shielding effect. For 10 points, name this value which, via Coloumb's law, determines how strongly electrons are bound to an atom.
This parameter is varied in Hartree-Fock methods to improve numerical stability, at first increased and then slowly reduced to its correct values as orbitals begin to converge.
Effective {Nuclear Charge} [accept {kernal charge}, accept {Z} or {Z}-{eff} or {Z}-{effective}, accept "{shielding constant}" until "{this quantity minus s}"]