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When listing electron configurations what do the arrows point in opposite directions?
Wiki User
∙ 13y ago
Did you mean "why do the arrows point in different directions?" if so, the answer is that, since electrons are both negatively charged, the will repel from each other, causing one to go in one direction, and the other opposite that. Think "Pauli exclusion principle" which states "no two electrons in the same atom can be in the same quantum state." This 'state' includes spin, and the arrows represent the spin of the electron orbit.
I hope this helped!
Wiki User
∙ 13y ago
The arrows in a Hund's rule notation indicate that the electrons have parallel spins (i.e., one pointing upward and one pointing downward). This follows the Pauli exclusion principle, which states that no two electrons in an atom can have the same set of quantum numbers.
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