Chemistry Atomic Structure UHS 2024
PMDC Verified Question 2 of 95
The p orbital has
A
2 lobes
B
3 lobes
C
4 lobes
D
5 lobes
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: 2 lobes
Concept: The geometric shape of an orbital represents the probability boundary where an electron is likely to be found.

Formula: None required.

Solution:
  • A \( p \)-orbital (\( l = 1 \)) is characterized by a "dumbbell" shape.
  • This dumbbell consists of exactly two distinct teardrop-shaped regions called "lobes".
  • These two lobes are separated by a nodal plane passing through the nucleus, where the probability of finding an electron is precisely zero.


Why other options are incorrect: \( d \)-orbitals typically have 4 lobes (clover shape). 3 and 5 lobes do not correspond to standard orbital geometries.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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