Hunds Rule
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Hunds Rule:
Imagine you're boarding a bus where everyone prefers to sit alone before having to share a seat with someone else. This is similar to Hund's rule, which states that electrons will fill up each available seat (or orbital) with the same spin before pairing up with an opposite spin. Just like passengers preferring their own space first, electrons spread out in equal-energy orbitals singly before doubling up, ensuring maximum distance and minimal repulsion, similar to people preferring an empty seat next to them.
Practice Version
Hunds Rule: Electrons with the same spin must occupy each equal-energy orbital before electrons with opposite spins can occupy those orbitals. Hund's rule. Hund's rule states that electrons will fill empty orbitals of the same energy with their spins aligned before pairing up.