Quiz 14


Ch. 31


Useful numbers:  Mass of proton=1.007276u

                            Mass of neutron=1.008665u



1)Find the binding energy for 49Be. Mass of Be is 9.01218u






















2) 214Pb decays via two β+ decays followed by one α decay.



a) What are the final products?







b) The half-life for the 214Pb decay is 27 min.  After 10 hrs you find that 3g remain. 


      How much did you start with?