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Manipal Medical Manipal Medical Solved Paper-2002

  • question_answer
    What will be the amount of energy absorbed when an electron jumps from first orbit to second orbits? (If the value of energy m nth orbit of N-atom is expressed as\[\left. E=-\frac{13.6}{{{n}^{2}}}eV \right)\]

    A)  \[-3.4eV\]        

    B)  \[-6.6eV\]

    C)  \[-8.1eV\]         

    D)  \[-10.2eV\]

    Correct Answer: D

    Solution :

     Energy of nth orbit of hydrogen atom \[{{E}_{n}}=-\frac{13.6}{{{n}^{2}}}eV\] The energy absorbed/ when an electron jumps from the first energy level\[(n=1)\] to second level\[(n=2)\] \[=-13.6\times \left( \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} \right)\] \[=-13.6\left[ \frac{1}{{{(1)}^{2}}}-\frac{1}{{{(2)}^{2}}} \right]\] \[=-13.6\times \frac{3}{4}=-10.2\,eV\]


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