Question

Which of the following set of quantum numbers is not valid?

• A. n = 5, l = 2, m = 0, s = 1/2
• B. n = 1, l = 2, m = 0, s = 1/2
• C. n = 5, l = 3, m = 2, s = 1/2
• D. n = 5, l = 2, m = 0, s = -1/2

Answer 1

Answer:

B. n = 1, l = 2, m = 0, s = 1/2

The set of quantum number n = 1, l = 2, m = 0, s = 1/2, is not valid because the value of azimuthal quantum number should lie only in between 0 and n-1, where n is principal quantum number.