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  3. 9th Class
  4. Science
  5. Structure of the Atom

9th Class Science Structure of the Atom Question Bank Self Test-4

  • question_answer
    The number of neutron in an atom having atomic number 11 and mass number 23 is:

    A)  11

    B)  10

    C)  13 

    D)  12

    E)  None of these

    Correct Answer: D

    Solution :


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