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(a) Explain theprocesses ofnuclear fission and nuclear fusion by usingthe plotof bindingenergyper nucleon (BE/A) versus the mass number A. (b) A radioactive isotope has a hald -life of 10 years. Howlong will it takefor theactivity to reduceto 3.125%. |
Answer» Solution :The point of (B.F/nucleon ) verses mass number is as shown  [Note : Also accept the diagram that just shows the general shapes of the graph ] From the plot we note that (i) During nuclear Fission A heavy nucleus in the larger mass region (`A gt 200) ` breaks into two middle level nuclei , RESULTING in an INCREASE in B.E/nucleon , this results in a release of energy. (ii) During nuclear fussion Light nucleus in the LOWER mass region `(A lt 20) ` fuse to form a nucleus having HIGHER B.E/nucleon .Hence Energy gets RELEASED [Alternatively -As per the plot :During nuclear Fission as well as nuclear fussion . the final value of B.E/nucleon is more than its intial value . Hence energy gets released in both these processes.] |
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