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

  • question_answer
    An element has an atomic number 20. How many electrons will be present in \[K,\,\,L,\,\,M\] and \[N\] shells of its atom?

    A) \[2,\,\,8,\,\,6,\,\,4\]         

    B)        \[2,\,\,8,\,\,7,\,\,3\]

    C) \[3,\,\,7,\,\,7,\,\,3\]         

    D)        \[2,\,\,8,\,\,8,\,\,2\]  

    Correct Answer: D

    Solution :

     \[Z=20\] Electronic configuration in \[K\] shell\[=2\] \[L\] shell \[=8\] \[M\] shell\[=8\] \[N\] shell \[=2\]


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