Chemistry Atomic Structure SZABMU 2022
PMDC Verified Question 49 of 95
Shape of the sub shell is explained by which quantum number:
A
Principal quantum number
B
Magnetic quantum number
C
Azimuthal quantum number
D
Spin quantum number
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Azimuthal quantum number
Concept: The 3D geometric shape of an electron's probability cloud is determined by its angular momentum.

Formula: None required.

Solution:
  • The azimuthal quantum number (also called the angular momentum quantum number), represented by \( l \), dictates the shape of the orbital.
  • If \( l=0 \), the shape is a sphere (\(s\)-orbital).
  • If \( l=1 \), the shape is a dumbbell (\(p\)-orbital).
  • If \( l=2 \), the shape is generally a double-dumbbell (\(d\)-orbital).


Why other options are incorrect: Principal handles size, Magnetic handles spatial orientation (tilt/direction), and Spin handles internal angular momentum.

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