About the Mulliken Electronegativity in DFT
  In the framework of density functional theory a new formulation of electronegativity that recovers the Mulliken definition is proposed and its reliability is checked by computing electronegativity values for a large number of elements. It is found that the obtained values, which are compared with previously proposed electronegativity scales, fulfill the main periodic criteria. 
Mihai V. Putz, Nino Russo and Emilia Sicilia