已知①~⑩十种元素,在元素周期表中的位置如图所示。回答下列问

已知①~⑩十种元素,在元素周期表中的位置如图所示。回答下列问题:

      

1)在上述十种元素中,最高价氧化物的水化物的酸性最强的化合物的化学式是           ,半径最小的离子的离子符号是         

2)③和⑧氢化物的稳定性比较:         >           (填化学式)

3)上述十种元素中,金属性最强的元素在周期表中的位置是                      

4)画出⑥元素原子结构示意图           

5)比较⑨和⑩离子半径大小             (填离子符号)。

6)写出③的气态氢化物与⑨的最高价氧化物对应水化物反应的化学方程            

                                                  

答案

10分)1HClO4  H2NH3> PH3 3 3 周期 A 4

562NH3H2SO4===(NH4)2SO4

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