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I disagree, I beleive chemistry to be fundamental to the definition of the electron. Are you saying physics is more important than chemistry? What is your bias? What is you source when you say that chemistry is subset of physics? How do chemistry only use the electron, any more that physicist? And crystal fields is not an alternative model, but a fundamental one. It was in my freshmen chemistry textbook. I think the article in wikipedia, is an ""alternative model."" 

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