According to the Aufbau principle, the most stable arrangement of electrons places them in degenerate orbitals with the same spin.

Question

Quizplus · Accepted Answer

The Aufbau principle states that electrons fill orbitals starting with the lowest energy level first, not necessarily with the same spin in degenerate orbitals. The same spin in degenerate orbitals is related to Hund's rule, not the Aufbau principle.

According to the Aufbau Principle, the Most Stable Arrangement of Electrons