A) \[4.53eV\]
B) \[1.51eV\]
C) \[4eV\]
D) \[3.4eV\]
Correct Answer: B
Solution :
: Energy of the electron in nth orbit is \[{{E}_{n}}=-\frac{13.6}{{{n}^{2}}}eV\] For third orbit, \[n=3\] \[\therefore \] \[{{E}_{3}}=-\frac{13.6}{{{3}^{2}}}eV=-1.51eV\]
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