四种短周期元素的性质或结构信息如下表。下列推断错误的是 元素

四种短周期元素的性质或结构信息如下表。下列推断错误的是

元素编号

元素性质或结构

T

M层上有2对成对电子

X

元素最高正价是+7

Y

第三周期元素的简单离子中半径最小

Z

单质是银白色固体、导电、密度比水小,与水剧烈反应、和氧气反应不同条件下产物不同

   AT的氢化物是同族元素氢化物中沸点最低的
   B
X的最高价氧化物对应的水化物,是无机含氧酸中的最强酸
   C
.离子半径从小到大的顺序:YZ T X
   D
XY形成化合物的晶体类型与XZ形成化合物的晶体类型不同

答案

A

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