Practice question
Question
The angular momentum of an electron in the fourth orbit of a hydrogen atom is 4.22 × 10⁻³⁴ J s. What is its energy in eV? (h = 6.626 × 10⁻³⁴ J s, 1 eV = 1.6 × 10⁻¹⁹ J)
Explanation
n=4. E₄ = -13.6/16 = -0.85 eV.
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