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Practice question

MCQ

Question

The ratio of the velocities of an electron in the second orbit of H to the third orbit of Li²⁺ is: (v₁ for H = 2.19 × 10⁶ m s⁻¹)

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Explanation

For H (Z=1), v₂ = 2.19×10⁶ / 2 = 1.095×10⁶ m s⁻¹. For Li²⁺ (Z=3), v₃ = 3 × 2.19×10⁶ / 3 = 2.19×10⁶ m s⁻¹. Ratio = 0.5.

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