题目

The H1Nl virus has been spreading world-wide，it is important for us to know how to control it．Please pay attention to the following points：     1．Don't touch your face．Above all，keep your hands away from your eyes，mouth and nose，all of which serve pathways(途径) for the viruses(病毒) to enter your body．     2．Wash your hands．If you have to touch your face，wash your hands，getting under the fingernails for 20 to 30 seconds with hot soap and water before．Soaps with surfactants(表面活性剂) can deal with flu viruses．     3．Cover your nose an元素的电负性用来描述不同元素的原子对键合电子吸引力的大小。电负性应用：判断元素的金属性和非金属性的强弱。下表列出了同周期的几种短周期元素的部分性质请回答下列问题：(l)写出D元素的离子结构示意图_______________；(2)X的值应为____（填字母）；A.3.6 B.3.1 C.1.4 D.2.1(3)分析表中数据，简述同周期元素（除惰性气体）电负性大小与原子半径的关系：________________________________；(4)A、B、C三种元素形成的氢化物中，其稳定性由强到弱的顺序是：__________________（用化学式表示）(5)A、D最高价氧化物对应水化物相互反应的化学方程式：____。