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
    Which is different in isotopes of an element?

    A)  Atomic number              

    B)  Mass number

    C)  Number of protons  

    D)  Number of electrons

    Correct Answer: B

    Solution :

      Not Available


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