下列各数值表示有关元素的原子序数,其所表示的各原子组中能以共

下列各数值表示有关元素的原子序数,其所表示的各原子组中能以共价键相互结合成稳定化合物的是

A.18和 12                             B.6和17

C.11和16                              D.12和 9

答案

解析:A项中18号元素为稀有气体,不能形成化合物;B项以共价键相互结合成CCl4;C项、D项均以离子键形成Na2S、MgF2

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