MDCAT Chemistry MCQ #733

If the radius of the first Bohr orbit of hydrogen is 0.529 Angstrom, what is the calculated radius of the second orbit (n=2)?

MDCAT Chemistry MCQ #733

  1. Question 1

    Q1. If the radius of the first Bohr orbit of hydrogen is 0.529 Angstrom, what is the calculated radius of the second orbit (n=2)?

    • A) 1.058 Angstrom
    • B) 1.587 Angstrom
    • C) 0.264 Angstrom
    • D) 2.116 Angstrom

    Answer: 2.116 Angstrom

    Explanation: The radius of the nth orbit is proportional to n-squared; doubling n from 1 to 2 increases the radius four times.