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17-10-2021
Chemistry

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Why is it necessary for the spins of two electrons that occupy one orbital, to be in the opposite directions? What is that law called?

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17-10-2021

Answer:

Since electrons cannot have the same set of quantum numbers, a maximum of two can be in the n = 1 level, and a third electron must reside in the higher-energy n = 2 level. If there are two electrons in the n = 1 level, their spins must be in opposite directions.

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