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

9th Class Science Structure of the Atom Question Bank Atomic Structure IIT JEE Objective Problems

  • question_answer
    The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is

    A)  2                                            

    B)  17   

    C)  37                                         

    D)  38

    Correct Answer: D

    Solution :

      Not Available


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