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

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

  • question_answer
    Mass numbers of atoms of an element are 1, 2, 3 respectively. Identify the element.

    A)  Beryllium           

    B)  Lithium

    C)  Hydrogen      

    D)  Helium

    Correct Answer: C

    Solution :

        It is hydrogen                                       \[{{(}_{1}}{{H}^{1}},{{\text{ }}_{1}}{{H}^{2}},{{\text{ }}_{1}}{{H}^{3}})\]                


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