👉 In particle physics, a subelectron is an elementary particle that has an electron-like charge and mass but no electric current. It is the lightest known particle in the nucleus of an atom, with a mass of approximately 1/6400th of the atomic mass unit (amu) or about 93.56 MeV/c2. The subelectron is one of the stable particles that can exist within the nucleus of an atom, and it is often used in experiments to
