Which of the following quantum numbers tells the three-dimensional shape of an atomic orbital?
Correct answer: B. Azimuthal quantum number
- A. Principal quantum number
- B. Azimuthal quantum number
- C. Magnetic quantum number
- D. Spin quantum number
Explanation
The principal quantum number (n) represents the energy level or shell of an electron. It determines the size and energy of the orbital but does not provide information about the three-dimensional shape of the atomic orbital. The azimuthal quantum number determines the three-dimensional shape of an atomic orbital. It defines the specific orbital type or sublevel (s, p, d, f) within a given energy level. Each value of the azimuthal quantum number corresponds to a distinct shape, providing information about the spatial orientation of the orbital. The magnetic quantum number (mℓ or ml) determines the orientation of an atomic orbital within a specific sublevel. It specifies the number of orbitals and their spatial orientation but does not directly describe the three-dimensional shape of the orbital. The spin quantum number (ms) describes the spin orientation of an electron within an orbital, indicating whether it is spinning up or down. It does not provide any information about the three-dimensional shape of the atomic orbital
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About Quantum Numbers
Quantum numbers describe an electron's energy level, subshell, orbital orientation and spin. You examine the principal, azimuthal, magnetic and spin quantum numbers, their allowed values, orbital capacity and how they determine electronic configurations and distinguish electrons within an atom.
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