engineering physics MCQ #446

The radius of the nth orbit of hydrogen atom is given by r_n = n² * 0.053 nm. The radius of the 3rd orbit is

engineering physics MCQ #446

  1. Question 1

    Q1. The radius of the nth orbit of hydrogen atom is given by r_n = n² * 0.053 nm. The radius of the 3rd orbit is

    • A) 0.477 nm
    • B) 0.159 nm
    • C) 0.053 nm
    • D) 0.212 nm

    Answer: 0.477 nm

    Explanation: Substitute n = 3 in r_n = n² * 0.053 nm to get r_3 = 9 * 0.053 = 0.477 nm.