Practice question
Question
What is the velocity of an electron in the third orbit of He⁺? (v₁ for H = 2.19 × 10⁶ m s⁻¹)
Explanation
v₃ = Z v₁ / n = 2×2.19×10⁶/3 = 1.46×10⁶ m s⁻¹.
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