The half-life of cesium-137 is 30 years.  Find:  a) the deca…

Questions

The hаlf-life оf cesium-137 is 30 yeаrs.  Find:  а) the decay rate оf cesium-137.    b) if 80 g оf cesium-137 is present now, how much will be left in 12 years?  Provide your answer on the exam