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 "Electrons always occupy the lowest empty energy level" is a statement of

Chemistry
WAEC 2020

 "Electrons always occupy the lowest empty energy level" is a statement of

  • A. Aufbau Principle
  • B. Hund's rule
  • C. Pauli Exclusion Principle
  • D. Periodic law
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Correct Answer: Option A
Explanation

- The Aufbau principle states that electrons fill lower-energy atomic orbitals before filling higher-energy ones

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