Which of the following quantum numbers specifies the orientation of an atomic orbital in space relative to an external magnetic field?

💡 Solution & Explanation

The magnetic quantum number specifies the spatial orientation of an atomic orbital within a subshell when exposed to an external magnetic field, taking values from -l to +l. The principal quantum number determines the main energy level, whereas the azimuthal quantum number defines the orbital shape. Atomic structure and quantum numbers are core concepts in chemistry evaluations.