engineering physics MCQ #574

The radius of the nth orbit in a hydrogen atom is given by rn = n² * 0.53 Å. What is the radius of the third orbit?

engineering physics MCQ #574

  1. Question 1

    Q1. The radius of the nth orbit in a hydrogen atom is given by rn = n² * 0.53 Å. What is the radius of the third orbit?

    • A) 1.59 Å
    • B) 4.77 Å
    • C) 0.53 Å
    • D) 3.18 Å

    Answer: 4.77 Å

    Explanation: Substitute n = 3 into the given formula rn = n² * 0.53 Å to get r3 = 9 * 0.53 = 4.77 Å.