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  3. 9th Class
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  5. Structure of the Atom

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

  • question_answer
                                    The species having same number of protons are called:

    A)  Isobars                               

    B)  Isotones

    C)  both (a) and (b)              

    D)  Isotopes

    Correct Answer: D

    Solution :

        Isotopes are the atoms of same element with same atomic number and different mass number.


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