The ground state energy of hydrogen atom...

The ground state energy of hydrogen atom is -13.6eV . The energy of excited state `He^(+)` ion having principal quantum number n is , -6.04eV . The numerical value of n is ________.

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`E=-13.6xx(z^(2))/(n^(2))eV=-13.6xx((2)^(2))/((3)^(2))=-13.6xx(4)/(9)=-6.04eV`

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