(ii) The vibrational energy of a system has been decomposed into the atomic fragility modes through diagonalization of the DF Connectivity Matrix, by analogy with the formalism of the normal modes. We present numerical results for the evolution of the atomic fragility modes on the reaction path in the test reaction of the internal proton transfer in H2N-CHO molecule. The visualization of the involvement of bonds and/or contacts between individual atoms on consecutive steps of the reaction has been demonstrated.