[en] one of the sources of the sudden change in the nuclear core charge is the beta decay, which cause an increase in the atomic number by one unit.This sudden change may be felt by the atomic electrons to rearrange themselves, resulting in the simultaneous ejection of one or more electrons, electron shake-off (SKODiF).This SKOF will cause the formation of ions at different degrees of ionization (N+).The creation of an inner-shell hole (ISH) by photoionization is similar to the beta decay case in so far as the outer-shell electrons are concerned. In the present work, the probabilities of electron SKOF due to both the beta decay and the creation of ISH are calculated using a theoretical procedure derived (Omar and Hahn, 1992) in the sudden approximation. It is found that the probabilities of formation (PF) of positive ions at various charge states decrease smoothly as N+ increases in the beta decay case. However, PF peaks at a certain N+ for each atom is the ISH case. Calculations of the probabilities of electron SKOF processes are presented and discussed in details for some atoms, especially those which are subjected to the beta emission