quantum mechanics - What are parahelium and orthohelium? - Physics Stack Exchange

I have been learning a little about two-electron atoms, and there are some things that I do not fully comprehend. Some context: In the two books I have been reading (Physics of atoms and molecules,...

quantum mechanics - What are parahelium and orthohelium? - Physics Stack Exchange Stack Internal Knowledge at work Bring the best of human thought and AI automation together at your work. Explore Stack Internal What are parahelium and orthohelium? Ask Question Asked 3 years, 8 months ago Modified 2 years, 2 months ago Viewed 7k times 12 $\begingroup$ I have been learning a little about two-electron atoms, and there are some things that I do not fully comprehend. Some context: In the two books I have been reading ( Physics of atoms and molecules , by Bransden & Joachain, and Quantum Mechanics o

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