Use the drop-down menus to identify the definition of radiation and the different types of radioactive emissions. the process of emitting radiant energy in the form of waves or particles. two protons and two neutrons bound together into a particle identical to a helium nucleus. is a negatively charged electron emitted by the nucleus. the radioactive decay of an atom that releases a photon, which results from a redistribution of electric charge within a nucleus. alpha particlebeta particlegamma rayradiation me quickly ! i don't get it! t. t