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Unformatted text preview: Medium penetrating power stopped by thin metal foil Released when a neutron decays into a proton and an electron Written as _ or e or 0_ 5.) Gamma Rays High speed radiation without mass or charge Strong penetrating power partially stopped by thick lead and/or thick concrete Causes tissue damage Represented by _ 6.) Nuclear Stability Why are some atoms stable and others are not? Protons are repelling each other Atoms with too many or too few neutrons compared to the number of protons are unstable...
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