试题与答案

短周期的三种元素X、Y、Z,原子序数依次变小,原子核外电子层数之和是5.X元素原

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题目:

短周期的三种元素X、Y、Z,原子序数依次变小,原子核外电子层数之和是5.X元素原子最外电子层上的电子数是Y和Z两元素原子最外电子层上的电子数的总和;Y元素原子的最外电子层上的电子数是它的电子层数的2倍,X和Z可以形成XZ3的化合物.请回答:

(1)X元素的名称是______;Y元素的名称是______;Z元素的名称是______.

(2)YZ4化合物的结构式是______,电子式是______.Y的最高价氧化物的电子式为______.

(3)写出Y的最高价氧化物与X的氢化物的水化物反应的离子方程式______.

答案:

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思想;医药;占卜;种树。

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