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Verified Answer & Explanation⌄

Correct Answer: B) −5.45 × 10⁻¹⁹ J

Concept Explanation

For hydrogen, Eₙ = −2.18 × 10⁻¹⁸/n² J. For the L-shell, n = 2, so E = −5.45 × 10⁻¹⁹ J.

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