已知W、X、Y、Z为原子序数依次增大的短周期主族元素。W、Z同主族,

已知WXYZ为原子序数依次增大的短周期主族元素。WZ同主族,XYZ同周期,其中只有X为金属元素,X的核电荷数比Y4。下列说法一定正确的是

A. 离子半径:X<W<Z<Y

B. 含氧酸的酸性:Z>Y

C. 气态氢化物的稳定性:W<Y

D WX形成的化合物的化学式为X3WX3W2

答案

【答案】A

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