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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Self Evaluation Test - Structure of Atom

  • question_answer
    The energy of \[{{e}^{-}}\] in first orbit of \[H{{e}^{+}}\]is  \[-871.6\times {{10}^{-20}}J.\] The energy of \[{{e}^{-}}\]in first orbit of H is:

    A) \[-871.6\times {{10}^{-20}}\]   

    B) \[-435.8\times {{10}^{-20}}J\]

    C) \[-217.9\times {{10}^{-20}}J\] 

    D) \[-108.9\times {{10}^{-20}}\]

    Correct Answer: C

    Solution :

    [c] \[{{E}_{{{1}_{He}}}}+={{E}_{{{1}_{H}}}}\times {{Z}^{2}}\] \[\therefore -871.6\times {{10}^{-20}}={{E}_{l}}_{_{H}}\times 4\] \[\therefore {{E}_{l}}_{_{H}}=-217.9\times {{10}^{-20}}J\]


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