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Consider the following list of electron configurations:
(1) \( 1 s^{2} 2 s^{2} 3 s^{2} \)
(2) \( 1 s^{2} 2 s^{2} 2 p^{6} \)
(3) \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1} \)
(4) \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} \)
(5) \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{6} \)
Which one of the above configurations represents an excited state of a neutral atom?
(A) 1
(B) 3
(C) 2
(D) 4
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