  Calculations of the positron binding energies to all atoms in the periodic
table are presented and atoms where the positron-atom binding actually exists
are identified. The results of these calculations and accurate calculations of
other authors (which existed for several atoms only) are used to evaluate
recommended values of the positron binding energies to the ground states of
atoms. We also present the recommended energies of the positron excited bound
levels and resonances (due to the binding of positron to excited states of
atoms) which can not emit positronium and have relatively narrow widths. Such
resonances in positron annihilation and scattering may be used to measure the
positron binding energy.
