JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Nucleus, Nuclear Reaction

  • question_answer
    If m, mn and mp are the masses of \[_{Z}{{X}^{A}}\]nucleus, neutron and proton respectively                      [KCET 2003; CPMT 2003]

    A)            \[m<{{(A-Z)}_{{{m}_{n}}}}+Z{{m}_{p}}\]                     

    B)            \[m=(A-Z){{m}_{n}}+Z{{m}_{p}}\]

    C)            \[m=(A-Z){{m}_{p}}+Z{{m}_{n}}\]                                  

    D)            \[m>(A-Z){{m}_{n}}+Z{{m}_{p}}\]

    Correct Answer: A

    Solution :

               The mass of nucleus formed is always less than the sum of the masses of the constituent protons and neutrons i.e. \[m<(A-Z){{m}_{n}}+z{{m}_{p}}\].


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