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(C) An atom is in an excited state when an electron jumps from a lower energy orbital to a higher energy orbital,violating the Aufbau principle. In th

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$1s^2, 2s^2 2p^2, 3s^1$

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(C) An atom is in an excited state when an electron jumps from a lower energy orbital to a higher energy orbital,violating the Aufbau principle. In the configuration $1s^2, 2s^2 2p^2, 3s^1$,the ground state for an atom with $7$ electrons would be $1s^2, 2s^2 2p^3$. Since one electron has been promoted from the $2p$ orbital to the $3s$ orbital,this represents an excited state.

Which electronic configuration must represent an atom in an excited state?

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