There's a question which bugged me for quite a while. Say, in negative beta decay, in a tritium nucleus. 2 neutrons, 1 proton, 1 orbital electron. The neutron changes into a proton, by the exchanging of a W- particle which soon decays into a electron and an antineutrino. charge is conserved at the point where the W- decayed but, the electron is soon expelled from the nucleus as a beta particle. So now, er've got 1 neutron and 2 protons to deal with but only 1 orbiting electron, so how do the atom take care of this +1 charge?