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Railways Sample Paper RRB (Group D) Sample Test Paper-1

  • question_answer
    An atom of an element with mass number 23 and atomic number 11 will have-

    A)  11 neutrons, 12 protons and 11 electrons

    B)  11 protons, 12 neutrons and 11 electrons

    C)  11 protons, 12 electrons and 11 neutrons

    D)  23 protons and 11 electrons

    Correct Answer: B

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