Bohr ModelMediumQuestion 600206
Question
For a hydrogen-like ion He⁺ (Z=2), the energy of n=2 orbit is:
- A-13.6 eVCorrect
- B-6.8 eV
- C-27.2 eV
- D-54.4 eV
Correct answer
-13.6 eV
Explanation
En = −13.6Z²/n² = −13.6×4/4 = −13.6 eV. He⁺ with Z=2, n=2 has the same energy as H n=1.