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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

I.E. = E¥ – E3 = 0 – (−13.6×1232)\left( \frac{- 13.6 \times 1^{2}}{3^{2}} \right) = 1.51 eV