Question

Which quantum number determines the shape of an orbital?

• A. Principal quantum number
• B. Azimuthal quantum number
• C. Magnetic quantum number
• D. Spin quantum number

Hint:

Think of the quantum numbers as an address: $n$ is the City (size), $l$ is the Building Shape, $m_l$ is the Room Orientation, and $m_s$ is the Bed Choice!

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Quantum numbers are a set of four numbers that describe the size, shape, and orientation of orbitals and the spin of electrons.
Step 2: Detailed Explanation:
1. Principal quantum number (\(n\)): Determines the size and main energy level (shell) of the orbital.
2. Azimuthal (or orbital angular momentum) quantum number (\(l\)): Determines the three-dimensional shape of the orbital (subshell). For example, \(l=0\) is \(s\) (spherical), \(l=1\) is \(p\) (dumbbell), etc.
3. Magnetic quantum number (\(m_l\)): Determines the orientation of the orbital in space.
4. Spin quantum number (\(m_s\)): Describes the direction of electron spin.
Step 3: Final Answer:
The shape of an orbital is determined by the Azimuthal quantum number.