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  • The energy of an electron in nth orbit of hydrogen atom is . Energy requ

The energy of an electron in nth orbit of hydrogen atom is \mathrm{-13.6/n^{2}eV}. Energy required to excite the electron from the first orbit to the third orbit is
 

Option: 1

\mathrm{10.2\: J}


Option: 2

\mathrm{12.9\: J}


Option: 3

\mathrm{12.09\: eV}


Option: 4

\mathrm{13.6\: eV}


Answers (1)

best_answer

\mathrm{E =E_3-E_1=-\frac{13.6}{3^2}-\left(-\frac{13.6}{1^2}\right) }

\mathrm{E =-1.51+13.6=12.09 \mathrm{eV}}

Hence option 3 is correct.

 

Posted by

Rakesh

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