`1 s^(2)2 s^(2)2 p^(6)3 s^(1)`` 1 s^(2)2 s^(2)2p^(6)3s^(2)3P^(5)``1 s^(2)2S^(2)2p^(5)``1 s^(2)2 s^(2)2p^(6)3s^(2)3p^(6)`
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