Which quantum number determines the orientation of an orbital in space?

Which quantum number determines the orientation of an orbital in space?

Step 1: Understand that orbitals are regions in space where electrons are likely to be found.
Step 2: Know that quantum numbers are used to describe the properties of these orbitals.
Step 3: Identify the different types of quantum numbers: principal, azimuthal, magnetic, and spin.
Step 4: Focus on the magnetic quantum number, which is represented as m_l.
Step 5: Learn that the magnetic quantum number (m_l) specifically indicates the orientation of an orbital in three-dimensional space.
Step 6: Conclude that the answer to the question is the magnetic quantum number (m_l).

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