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
    Ratio of mass of proton and electron is

    A)  infinite                                

    B)  \[\text{1}.\text{8}\times \text{1}{{0}^{\text{3}}}\]

    C)  1.8                        

    D)  none of these

    Correct Answer: B

    Solution :

      Not Available


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