Question
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
En = 3 = – 1.51 eV [Q Z = 1]
En ® = 0