The beta-stable fully ionized nuclei (with all electrons stripped) are somewhat different. Firstly, if a proton-rich nuclide can only decay by electron capture (because the energy difference between the parent and daughter is less than 1.022 MeV, the amount of decay energy needed for positron emission), then full ionization makes decay impossible. This happens for example for Be. Moreover, sometimes the energy difference is such that while β decay violates conservation of energy for a neutral atom, bound-state β decay (in which the decay electron remains bound to the daughter in an atomic orbital) is possible for the corresponding bare nucleus. Within the range 2 ≤ A ≤ 270, this means that Dy, Ir, Tl, At, and Am among beta-stable neutral nuclides cease to be beta-stable as bare nuclides, and are replaced by their daughters Ho, Pt, Pb, Rn, and Cm.