Recently we have derived direct relations between the force divergences essential for the Reaction Fragility concept and the electron density gradient. We consider here a molecule as the system of atoms in an electronically stationary state, with no external field, other than generated by the nuclei in the system. The divergences of H-F forces in a molecule built with n atoms form the n x n DF connectivity matrix. As we have recently demonstrated, the elements of the connectivity matrix are exactly: 77,80