Question

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What does Hund's rule tell you to do?

Answer 1

Every orbital is singly occupied with one electron before any one is doubly occupied, and all electrons in singly occupied orbitals have the same spin

Answer 2

The rule states that electron occupy each orbital singly first before pairing takes place in a degenerate orbital. These implies that the most stable arrangement of electrons in subsheells is the one with the greatest number of parallel spin