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Why must the two arrows within a single bloc of an orbital diagram be written in opposite directions?
Wiki User
∙ 6y ago
The two arrows with a single block of an orbital diagram must be written in opposing directions because the electrons are said to be rotating in opposite directions. This means the two electrons in the orbital are spinning on their axis in opposite ways.
Wiki User
∙ 9y ago
Wiki User
∙ 6y agoThis is based on the Pauli Exclusion Principle which states that two electrons in the same orbital must have different spins. Or put another way....two or more identical fermions (particles with half-integer spin) cannot occupy the same quantum state within a quantum system simultaneously.
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