For the FULL state of all complexes, the metal-adsorbate "bond orders" are predicted to be slightly over 4 (C), 3 (CH), 2 (CH 2 ) and 1 (CH 3 ), which are in remarkable agreement with the valency of these adsorbates. As far as other ALMO-EDA states are concerned, the "bond orders" acquire only half of their values at the FRZ stage and increase slightly with the mutual polarization. Charge transfer, therefore, is key for each adsorbate to fully reach its maximum valency.