MDCAT Chemistry MCQ #905

Which principle explains why two electrons cannot occupy the same orbital with identical spins?

MDCAT Chemistry MCQ #905

  1. Question 1

    Q1. Which principle explains why two electrons cannot occupy the same orbital with identical spins?

    • A) Heisenberg's uncertainty principle
    • B) Pauli exclusion principle
    • C) Hund's rule
    • D) Aufbau principle

    Answer: Pauli exclusion principle

    Explanation: Pauli's principle prohibits same-spin electrons in one orbital. Heisenberg’s principle involves uncertainty in position and momentum.