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Question: Answered & Verified by Expert
An electron is at ground state of the H atom. The minimum energy required to excite the H atom into the second excited state is
PhysicsAtomic PhysicsNEET
Options:
  • A 13.6eV
  • B 12.1eV
  • C 10.2eV
  • D 3.4eV
Solution:
2990 Upvotes Verified Answer
The correct answer is: 12.1eV
According to question, for an electron to jump from first excited state to second, He

energy required is, ΔE=E3-E1

=-13.632-(-13.6)

[   Energy of excited 2nd excited state, E3=-13.69]

   ΔE=-1.5+13.6=12.1 eV

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