The term degeneracy means the number of different quantum states of an atom or molecule having the same energy. For example, the degeneracy of the n = 2 level of the hydrogen atom is 4 (a 2s quantum state, and three different 2p states). What is the degeneracy of the n = 1 level?
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I don't agree that the 2s and 2p levels have the same energy.
Yeah I was totally confused with this and I could not follow it in the book. This was a annoying problem.
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