短文改错

Dear editor，

I am a high school student. A few days before，one of my very good friend told me that he was going to stop school. He said that he wanted to start his own business. I tried my best to get him change his mind, but failed. I know it is difficult of him to change his mind. He is not doing so good in his studies, yet I want to insist that I give it a try. The process is important than the results. Now there are only 90 days leaving before the test. I am not sure that his decision is right or wrong. I needed your advice.

下列转化关系中，A—L均为中学化学中常见的物质，其中D为用途广泛的金属单质，B在常温常压下为无色液体，G为不溶于水但可溶于酸的白色固体，I为无色气体且能使湿润的红色石蕊试纸变蓝，L为无色气体，遇空气变为红棕色。

请完成下列问题：

（1）构成单质D的元素在元素周期表中处于第____________周期____________族。

（2）I物质的电子式为____________，F物质的化学式为____________；它们的晶体类型分别是：____________、____________。

（3）写出下列反应的化学方程式：

③___________________________________________；

⑤___________________________________________。