题目

----Children, please! I’m trying to work.   ----_________. A. All work and no play makes Jack a dull boy B. Terribly sorry and we will leave you alone now’ C. Like mother, like daughter D. Nothing is so serious, sorry 答案：B19．如图是部分短周期元素原子序数与最外层电子数之间的关系图，下列说法中正确的是（　　）A．元素对应的离子半径：Z＞M＞R＞WB．简单氢化物的沸点：W＞R＞Y＞XC．气态氢化物的稳定性：X＞Y＞R＞WD．Z、X、R、W的最高价氧化物对应的水化物均能与N的单质反应