第二周期元素X、Y、Z、W'的最高价氧化物溶于水可得四种溶液,0.010 mol

第二周期元素XYZW'的最高价氧化物溶于水可得四种溶液,0.010 mol·L-1的这四种溶液pH与该元素原子半径的关系如右图所示。下列说法正确的是

    A.气态氢化物的稳定性:Z>W>Y

    B.简单离子半径:Z<W                           

    CY元素存在同素异形体

    DXY的最高价氧化物对应的水化物恰好中时,溶液呈中性

 

答案

 C

 

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