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

  • question_answer
    An atom has mass number 23 and atomic number\[11\]. How many protons, electrons and neutrons are present in the atom?

    A) \[11,\,\,12,\,\,13\]           

    B)        \[11,\,\,11,\,\,12\]  

    C) \[11,\,\,11,\,\,13\]           

    D)        \[11,\,\,14,\,\,15\]

    Correct Answer: B

    Solution :

     \[Z=11\] \[i.e.,\] the no. of protons, \[A=23\] that is the no. of protons and neutrons. No. of neutrons\[=A-Z=23-11=12\].


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