Practice question

MCQ

Question

The velocity of an electron in the first orbit of a hydrogen atom is 2.19 × 10⁶ m s⁻¹. What is its velocity in the third orbit?

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Choose one · Correct answer highlighted

7.3 × 10⁵ m s⁻¹ Correct 2.19 × 10⁶ m s⁻¹ 1.46 × 10⁶ m s⁻¹ 6.57 × 10⁶ m s⁻¹

Explanation

v₃ = v₁/3 = 7.3×10⁵ m s⁻¹.

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