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

  • question_answer
    The mass of an a-particle is                                [CBSE PMT 1992]

    A)            Less than the sum of masses of two protons and two neutrons     

    B)            Equal to mass of four protons

    C)            Equal to mass of four neutrons                                       .

    D)            Equal to sum of masses of two protons and two neutrons

    Correct Answer: A

    Solution :

               This is due to mass defect because a part of mass is used in keeping the neutrons and protons bound as \[\alpha -\]particle.


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