ALPHA - - relatively heavy, high‐energy particles composed of 2 protons and 2 neutrobns, BETA - - small, fast‐moving electrons that vary in energy and penetrating power., GAMMA - - high‐energy electromagnetic radiation that can travel at the speed of light, NEUTRON - - usually emitted as a result of spontaneous or induced nuclear fission, X-RAY - - used to generate images of tissues and structures inside the body.,

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