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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic models and Planck's quantum theory

  • question_answer
    Energy of electron of hydrogen atom in second Bohr orbit is [MP PMT 2000]

    A)                 \[-5.44\times {{10}^{-19}}J\]      

    B)                 \[-5.44\times {{10}^{-19}}\,kJ\]

    C)                 \[-5.44\times {{10}^{-19}}\,cal\]               

    D)                 \[-5.44\times {{10}^{-19}}\,eV\]

    Correct Answer: A

    Solution :

               \[E=-\frac{2.172\times {{10}^{-18}}}{{{n}^{2}}}=\frac{-2.172\times {{10}^{-18}}}{{{2}^{2}}}\]                                    \[=-5.42\times {{10}^{-19}}J\].


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