  The electronic structure of heavy elements, when described in a space-time
which the metric is affected by the electromagnetic interaction, presents
instabilities. These instabilities increase with the atomic number, and above a
critical value, become important. The consistency of this theory [1], [2] and a
formulation based on the energy-momentum tensor is also investigated. With this
procedure, a dynamical cut-off appears in a natural way, and the field
equations for the general quantum mechanics are determined.
