Practice question
Question
The radius of the second orbit of a hydrogen atom is 2.116 × 10⁻¹⁰ m. What is the velocity of the electron in the fourth orbit? (v₁ for H = 2.19 × 10⁶ m s⁻¹)
Explanation
v₄ = v₁/4 = 5.475×10⁵ m s⁻¹.
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