Practice question
Question
The energy of an electron in the first orbit of a hydrogen atom is -2.18 × 10⁻¹⁸ J. What is the wavelength of the photon emitted when an electron in Be³⁺ transitions from n = 6 to n = 3? (h = 6.626 × 10⁻³⁴ J s, c = 3.0 × 10⁸ m s⁻¹)
Explanation
For Be³⁺ (Z=4), ΔE ≈ 2.903×10⁻¹⁸ J. λ ≈ 68.45 nm.
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