The isotopes, radiation coming out of the elements, or atoms that give out radiation because proton and neutron in the portion of the nucleus is not appropriate. Make it unstable substances decomposed, rays out.
Isotopes and radiation from the elements or atoms that give off radiation because the ratio of protons and neutrons in the nucleus is not appropriate to make it unstable substance decomposes to radiation.
Isotopes for radiation out to the same element or atomic radiation out because the proportion of โปรตอนและ neutrons in the nucleus is inappropriate. the unstable material is dissolved to radiation.