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NEET AIPMT SOLVED PAPER 2001

  • 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:

    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 \[Z{{m}_{p}}+Z{{m}_{n}},\] 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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