Which quantum number determines the shape of an orbital?
Correct answer: B. Angular momentum quantum number (l)
- A. Principal quantum number (n)
- B. Angular momentum quantum number (l)
- C. Magnetic quantum number (mₗ)
- D. Spin quantum number (mₛ)
Explanation
The angular momentum quantum number (l) defines the shape of the orbital: l = 0 → s orbital → spherical, l = 1 → p orbital → dumbbell-shaped, l = 2 → d orbital → cloverleafshaped, l = 3 → f orbital → complex shapes.
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About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
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