MDCAT Chemistry MCQ #773

What is the ratio of the radii of the 1st and 2nd orbits in a hydrogen atom?

MDCAT Chemistry MCQ #773

  1. Question 1

    Q1. What is the ratio of the radii of the 1st and 2nd orbits in a hydrogen atom?

    • A) 1:2
    • B) 1:4
    • C) 2:1
    • D) 4:1

    Answer: 1:4

    Explanation: r ∝ n^2, r1:r2 = 1^2:2^2 = 1:4. Option A is for a wrong proportionality.