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excited state: state in which an atom or molecule picks up outside energy, causing an electron to move into a higher-energy orbital.
[Ar]4s^1 4p^1 -- this is an excited state -- it promoted an electron from the 4s^2 to 4s^1 4p^1; its rest state wants to have a filled 4s^2 shell. [He]1p^1 -- does not exist (there is no such thing as the 1p state).