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Energy of the Electron & Energy Levels question from NEET 2023

Q24NEET 2023Easy

Energy of the Electron & Energy Levels

The ground state energy of hydrogen atom is $-13.6\text{ eV}$ . The energy needed to ionize hydrogen atom from its second excited state will be:

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Answer: (c)

Second excited state is $n = 3$ : $E_3 = \frac{-13.6}{9} = -1.51$ eV.
Ionisation energy from this state $= 0 - E_3 = 1.51$ eV
So the answer is (c) $1.51$ eV.

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