如表所示的五种元素中，W、X、Y、Z为短周期元素，这四种元素的原子最外层电子数之和为22．下列说法不正确的是 XYWZT_刷题宝

题干

如表所示的五种元素中，W、X、Y、Z为短周期元素，这四种元素的原子最外层电子数之和为22．下列说法不正确的是（）

	X	Y
W			Z
T

A：X，Y，Z三种元素最低价氢化物的沸点依次升高

B：由X，Y和氢三种元素形成的化合物中有共价键

C：物质WY₂、W₃X₄均有熔点高、硬度大的特性

D：T元素肯定是金属元素

上一题下一题 0.0难度选择题更新时间:2019-04-17 06:46:09

答案(点此获取答案解析）

A

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