I'm a chemist trying to understand atomic term symbol.(adsbygoogle = window.adsbygoogle || []).push({});

If we list all the micro-states of certain multi-electron configuration, these micro-states can be grouped into several certain terms characterized by L and S. In other words, when we compute the M_{L}and M_{S}for each of the micro-state, they should belong to certain (L, S) configuration, much analogous to the single electron case wherelsets boundary for m_{l},sfor m_{s}. It is legitimate to do so because the operator L and S commute with H, so L and S are good quantum numbers describing the states. After deriving L and S, we use RS coupling scheme to calculate J.

If my understanding is correct, then this point should follow: certain micro-state can arbitrarily belong to several terms. For example, 3d^{2}contains terms 1D and 3P. A micro-state with M_{L}=1, M_{S}=0 can be either 1D or 3P, right? In that sense, it seems pointless talking about specific term of a micro-state, right?

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# Pointless in talking about atomic term for a certain micro-state?

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