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Practice question

MCQ

Question

The frequency of a photon emitted during a transition from n = 7 to n = 4 in a hydrogen atom is: (E₁ = -2.18 × 10⁻¹⁸ J, h = 6.626 × 10⁻³⁴ J s)

Options

Choose one · Correct answer highlighted

Explanation

ΔE ≈ 9.176×10⁻²⁰ J. ν ≈ 1.385×10¹⁴ Hz.

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