When Filling Degenerate Orbitals, Electrons Fill Them Singly First, with Parallel

question 122

Multiple Choice

When filling degenerate orbitals, electrons fill them singly first, with parallel spins. What is this known as?

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

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