2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179865We show, at leading-order in the multipole expansion of the electron-nucleus interaction, that nucleon electric-dipole moments are completely shielded by electrons so that they contribute nothing to atomic electric-dipole moments, even when relativity in the nucleus is taken into account. It is well known that relativistic electron motion, by contrast, leads to dipole moments that are not screened; we discuss the reasons for the difference.4 pages, typeset by REVTeX, submitted to PRCNuclear Theorytext