Draw the graph showing the variation of binding energy per nucleon with the mass number. What are the main inferences from the graph?Explain with the help of this plot the release of energy in the process of nuclear fission and fusion.

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  • Binding energy per  nucleon is practically constant for mass number. (30 <  A  < 170)

  • Binding energy per nucleon is lower for both light nuclei ( A  < 30) and heavy nuclei ( A > 170). 
     

  • Importance of Binding energy curve

  • As we move from heavy nuclei region to the middle region of the plot , there is a gain in the overall binding energy and hence, in the release of energy. This indicates that energy can be released when a heavy nucleus breaks into roughly two equal fragments. This process is called nuclear fission.

  • When we move from lighter nuclei to heavier nuclei, there will be gain in the overall binding energy and release of energy. This is called nuclear fusion

Hope this information will clear your doubt about nuclear physics.
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