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NEET Physics Nuclear Physics And Radioactivity NEET PYQ-Nuclear Physics

  • question_answer
    \[{{m}_{p}}\] and \[{{m}_{n}}\] are masses of proton and neutron respectively. An element of mass M has Z protons and N neutrons then:                                                                                        [AIPMT 2001]

    A)  \[M>Z{{m}_{p}}+N{{m}_{n}}\]

    B)     \[M=Z{{m}_{p}}+N{{m}_{n}}\]

    C)     \[M<Z{{m}_{p}}+N{{m}_{n}}\]

    D)     M may be greater than, less than or equal to \[Z{{m}_{p}}+N{{m}_{n}},\] depending on nature of element

    Correct Answer: C

    Solution :

    When a nucleus is formed, then the mass of nucleus is slightly less than the sum of mass of Z protons and N neutrons.    i.e.,    \[M\,<\,(Z{{m}_{p}}+N{{m}_{n}})\]


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