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Clearly, a gap of 11.1 eV cannot occur.

1. -0.58 eV
2. -0.85 eV
3. -1.51 eV
4. -13.6 eV

Correct answer: -13.6 eV

Solution

The value -13.6 eV corresponds to the energy of the electron in the ground state of a hydrogen atom, which is a fundamental concept in atomic physics. The other options do not match this key energy level.

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