Energy of 2s orbital in H, Li, Na, K

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Arrange in decreasing order, the energy of 2s orbital in following atoms H, Li, Na, K

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    July 25, 2017 at 6:16 pm

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    More will be the screening effect, less will be the energy of 2s orbital.

    Since number of electrons are highest in K, so screening effect will be more effective in K than Na and similarly the screening effect will be more in Na than Li and more in Li than H. So

    order of energy of 2s orbital in given atoms will be

    E2s(H) > E2s(Li) >E2s(Na) > E2s(K)

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