What wavelength (in nm) is observed when an electron in a helium atom transitions from n=3 to n=2?
回答 (1)
2020-09-22 12:23 pm
✔ 最佳答案
Atomic number of helium, Z = 2Rydberg constant, R = 1.097 × 10⁷ m⁻¹ = 1.097 × 10⁻² nm⁻¹
n₂ = 3 to n₁ = 2
Rydberg equation: 1/λ = RZ² [(1/n₁²) - (1/n₂²)]
Then, λ = 1 / {RZ² [(1/n₁²) - (1/n₂²)]}
Wavelength, λ
= 1 / {1.097 × 10⁻² × 2² × [(1/2²) - (1/3²)] nm
= 164.1 nm
收錄日期: 2021-04-24 08:03:32
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