题目

Lost in the Mountain Teenager Jake Deham was skiing (滑雪) with his family in the USA when he fell over and lost one of his skis. His family didn’t know that he had a problem. They kept on skiing. When they got to the foot of the mountain, there was no sign of Jake. Jake couldn’t find his ski anywhere. In the end, he decided to take off his other ski and walk down the mountain. But he couldn’t work out the right way to go. It was now getting dark and he was a long way from any place of safety. He knew that he might die that night in the cold temperatures. But Jake kept calm(镇（15分）下表是元素周期表的一部分, 针对表中的①～⑨种元素，填写下列空白：     主族 周期 ⅠA ⅡA ⅢA ⅣA ⅤA ⅥA ⅦA 0族 2 ① ② ③ 3 ④ ⑤ ⑥ ⑦ ⑧ ⑨ 4 ⑩  用化学符号回答下列问题：（1）在这些元素中,最活泼的金属元素是           ，最活泼的非金属元素是         ，化学性质最不活泼的是:             。（2）在最高价氧化物的水化物中，酸性最强的化合物的是____   _   __，碱性最强的化合物的是:____ _____      ____。（3）最高价氧化物是两性氧化物的元素是_____ ____；写出它的氧化物与氢氧化钠反应的离子方程式______________ _________ _________ _________ ____。（4）在这些元素中，原子半径最小的是          ，原子半径最大的是              。（5）表示①与⑧的化合物的分子式               ，该化合物是由             （填“极性”“非极性”下同）键形成的。（6）用电子式表示元素④与⑦的化合物的形成过程：                           ，该化合物属于         (填 “共价”或“离子”)化合物。