The ground state energy of H-atom 13.6 eV. The energy needed

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The ground state energy of H-atom 13.6 eV. The energy needed to ionize H-atom from its second excited state.

1. 1.51 eV
2. 3.4 eV
3. 13.6 eV
4. 12.1 eV

Correct Option: A

Second excited state corresponds to n = 3

∴ E =	13.6	eV = 1.51 eV
	3²