Chemistry Atomic Structure SZABMU 2022
PMDC Verified Question 50 of 95
The electronic configuration for degenerated orbitals is explained by:
A
Aufbau's Principle
B
\( (n + 1) \) rule
C
Pauli's exclusion principle
D
Hund's rule
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Hund's rule
Concept: Degenerate orbitals are orbitals that possess the exact same energy level (e.g., \( p_x, p_y, p_z \)). A specific rule dictates how electrons fill these equal-energy slots.

Formula: None required.

Solution:
  • Hund's Rule of Maximum Multiplicity states that when filling degenerate orbitals, electrons will first fill them singly, with parallel spins, before they begin to pair up.
  • This minimizes electron-electron repulsion, resulting in a more stable, lower-energy atomic state.


Why other options are incorrect: Aufbau explains filling across different energy levels. Pauli's principle dictates that paired electrons must have opposite spins. The \( (n+l) \) rule determines the overall energy order of subshells.

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