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9th Class Science Structure of the Atom Question Bank Structure of the Atom

  • question_answer
    What does an atom and an ion of the isotope of sodium \[_{11}^{22}Na\] both contain?

    A)  \[11\] electrons  

    B)         \[12\] neutrons  

    C)  \[23\] protons   

    D)         \[23\] neutrons

    Correct Answer: B

    Solution :

     An atom of sodium has \[11p,\,\,12n\] and\[11\,\,e\]. The sodium ion\[,\]\[N{{a}^{+}}\], has \[11\,\,p,\,\,12\,\,n\] and\[10\,\,e\]. So, both contain \[12\] neutrons each.


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