下表为元素周期表中短周期的一部分,其中Y元素的原子序数为M与N元

下表为元素周期表中短周期的一部分,其中Y元素的原子序数为MN元素原子序   数之和。下列说法正确的是

M

N

X

Y

Z

A.氢化物的稳定性:N >Z,是因为其氢化物分子可形成氢键
B.
元素的非金属性:M > Y,是因为单质M能与YN2反应生成单质Y
C.
熔沸点:YN2>MN2,是因为YN2的分子间作用力强
D.
简单离子的半径:N >X,是因为它们具有相同的电子层结构且X的核电荷数更大

答案

D

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