X和Y均为元素周期表前20号元素，X2-和Yˉ离子具有相同的电子层结构。下列正确的是：_刷题宝

题干

X和Y均为元素周期表前20号元素，X^2-和Yˉ离子具有相同的电子层结构。下列正确的是：

A：原子半径 X＜Y

B：离子半径X^2-＞Yˉ

C：质子数X＞Y

D：氢化物的稳定性H₂X ＞HY

上一题下一题 0.0难度选择题更新时间:2018-02-24 05:02:38

答案(点此获取答案解析）

B

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