Which of the following magnetic quantum numbers is not possible if the principal quantum number is 4?

Question

Quizplus · Accepted Answer

The magnetic quantum number (m_l) can range from -l to +l, where l is the azimuthal quantum number (or angular momentum quantum number) and can take values from 0 to n-1 (where n is the principal quantum number). For n=4, the maximum value of l is 3, which means the maximum m_l can be +3. Therefore, m_l = 5 is not possible.

Which of the Following Magnetic Quantum Numbers Is Not Possible