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以下是基态原子的电子排布式的是 ( )
A.1s12s1 B.1s12s12p1 C.1s22s22p6 3p1 D.1s22s22p63 s2
A.1s12s1 B.1s12s12p1 C.1s22s22p63p1 D.1s22s22p63 s2