在下列电子结构中,第一电离能最小的元素的原子结构可能是(   

在下列电子结构中,第一电离能最小的元素的原子结构可能是(    )。

A.2s22p3            B.2s22p4            C.2s22p5            D.2s22p6

答案

B

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