MDCAT Chemistry MCQ #769

The velocity of an electron in the 1st orbit of hydrogen is 2.19 × 10^6 m/s. What is the velocity in the 3rd orbit?

MDCAT Chemistry MCQ #769

  1. Question 1

    Q1. The velocity of an electron in the 1st orbit of hydrogen is 2.19 × 10^6 m/s. What is the velocity in the 3rd orbit?

    • A) 7.3 × 10^5 m/s
    • B) 2.19 × 10^6 m/s
    • C) 6.57 × 10^6 m/s
    • D) 1.095 × 10^7 m/s

    Answer: 7.3 × 10^5 m/s

    Explanation: v ∝ 1/n, v3 = v1/3 = 7.3 × 10^5 m/s. Option B is for n=1.