题目

完形填空 My cousin Amy likes shopping. She oftenbuys 1 for her family. One day, she goes to a 2.It's on sale. She buys a 3 skirt for her mother Cindy. Blue is hermother's favorite color. Amy buys a white shirt for her father Henry and asweater for her sister Linda. The sweater is green and 4 very nice. She buys a pair of sports shoes forher 5 Jack. He likes playing sports, so he 6 it. Amy loves her grandma. And 7 does Amy buy for her? She buys her a 8 bag. She can put her radio, keys and manyother things 9 it. Her family like the things very much. They10 Amy is a good girl. （1） 有X、Y、Z、W四种短周期元素，已知： ①Z+与W的气态氢化物分子具有相同的电子数；X2－、Y－与Y的气态氢化物分子具有相同的电子数； ②X单质在空气中燃烧产生气体R； ③Y的气态氢化物与W的气态氢化物相遇时有白烟生成． 请回答： (1)画出X2－的原子结构示意图________． (2)Z的单质在空气中燃烧产物的化学式为：________． (3)实验室制取W的气态氢化物的反应方程式为： ___________________． (4)向Y单质的水溶液中通入过量气体R的现象为： ___________________； 反应的离子方程式为___________________．