如图为元素周期表前四周期的一部分, 下列有关R、W、X、Y、Z 这5种

如图为元素周期表前四周期的一部分,

下列有关RWXYZ 5种元素的叙述中, 正确的是

A.常压下5种元素的单质中Z单质的沸点最高

BYZ的阴离子电子层结构都与R原子的相同

CW的氢化物的还原性比Y的氢化物的还原性弱

DY元素的非金属性比W元素的非金属性强

答案

D

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