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

  • question_answer
    In \[_{88}R{{a}^{226}}\]nucleus, there are                                                           [MP PMT/PET 1998]

    A)            138 protons and 88 neutrons

    B)            138 neutrons and 88 protons

    C)            226 protons and 88 electrons

    D)            226 neutrons and 138 electrons

    Correct Answer: B

    Solution :

                       \[_{z}{{X}^{A}}{{=}_{88}}R{{a}^{226}}\]                    Number of protons = Z = 88                    Number of neutrons \[=A-Z=226-88=138\].


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