The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number of the hydrogen atom is 4,there will be how many permitted orbital magnetic quantum numbers?
A)three
B)four
C)seven
D)nine

Question

Quizplus · Accepted Answer

The orbital magnetic quantum number (m_l) can take values from -l to +l, including zero. If the orbital quantum number (l) is 4, then m_l can be -4, -3, -2, -1, 0, 1, 2, 3, 4, which gives a total of 9 possible values.

The Quantum Mechanical Model of the Hydrogen Atom Requires That