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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Rate of decay and Half-life

  • question_answer
    The atomic mass of an element is 12.00710 amu. If there are 6 neutrons in the nucleus of the atom of the element, the binding energy per nucleon of the nucleus will be [MP PMT 1999]

    A)                 7.64 MeV            

    B)                 76.4 MeV

    C)                 764 MeV             

    D)                 0.764 MeV (\[{{e}^{-}}\]=0.00055 amu, \[p\]=1.00814 amu, \[n\]=1.00893 amu)

    Correct Answer: A

    Solution :

           Mass of 6 neutrons = 6.05358 amu, Mass of 6 protons = 6.04884 amu, Mass of n + Mass of p =12.10242 amu                    Mass defect = 12.10242 ? 12.00710 = 0.09532                    Binding energy = 0.09532 \[\times \] 931 = 88.74292 MeV.                    Binding energy per neucleon = 88.74292/12                                 =7.39 MeV


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