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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 HOTS Subjective Problems

  • question_answer
    In which of the following, the ratio of number of electrons present in K-shell to L-shell is 1:2? (a) Hydrogen                     (b) Beryllium (c) Carbon                           (d) Oxygen

    Answer:

                   
    Element Z Electronic configuration Ratio of K:L electrons
    K L M N
    H 1 1 .. .. .. 1:0
    Be 4 2 2 .. .. 1:1
    C 6 2 4 .. .. 1:2
    O 8 2 6 .. .. 1:3


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