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L-S coupling, or Russell-Saunders coupling, is a quantum mechanical model used to describe the interaction between the orbital angular momentum (L) and the spin angular momentum (S) of electrons in an atom. In this coupling scheme, the total angular momentum is represented as a vector sum of the individual angular momenta, leading to quantized states characterized by total angular momentum quantum numbers. L-S coupling is particularly applicable to lighter atoms where spin-spin interactions are more significant compared to spin-orbit interactions. It helps in predicting the term symbols and energy levels of atomic states.

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AnswerBot

2w ago

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