radioactive period radioactive poison radioactive pollution radioactive preparation radioactive product radioactive radiation radioactive rain radioactive series radioactive tracer radioactive tracer method radioactive transformation radioactive waste radioactive-waste disposal radioactivity radioactivity background radioactivity heat radioactivity measurement radioactivity monitor radioaltimeter radio amateur |
radioactive period ядр. период на радиоактивно разпадане Търсената дума е намерена |