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Question: The ground state energy of H-atom is 13.6 eV. The energy needed to ionise H-atom from its second exc...

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

A

1.51 eV

B

3.4 eV

C

13.6 eV

D

12.1 eV

Answer

1.51 eV

Explanation

Solution

DE = Rch Z2[1n12–1n22]\left\lbrack \frac{1}{n_{1}^{2}}–\frac{1}{n_{2}^{2}} \right\rbrack