MDCAT Chemistry MCQ #762

What is the radius of the 2nd orbit in a hydrogen atom? (a0 = 0.529 Å)

MDCAT Chemistry MCQ #762

  1. Question 1

    Q1. What is the radius of the 2nd orbit in a hydrogen atom? (a0 = 0.529 Å)

    • A) 1.058 Å
    • B) 2.116 Å
    • C) 0.529 Å
    • D) 4.232 Å

    Answer: 2.116 Å

    Explanation: r ∝ n^2, r2 = 0.529 × 2^2 = 2.116 Å. Option A is for n=1 of He+.