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Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

What energy is required to remove an electron from n=2 state in hydrogen ?

Options:

13.6eV

3.4 eV

6.8 eV

27.2 eV

Correct Answer:

3.4 eV

Explanation:

Energy for the nth state, E_n = E₀Z²/n²

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