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Nuclear Radiation (breaking up of atoms (decay) gives off nuclear…
Nuclear Radiation (breaking up of atoms (decay) gives off nuclear radiation, Activity of a sample is measured by a GM tube in counts/second, Half-life is the time taken by a radioactive isotope to decay by half., Background radiation is some radiation that is always present... radon gas, cosmic rays, electronic equipment, etc, Activity of a sample is the average number of disintegrations per second, exposure to radioactive samples should be limited as much as possible.)