【简答题】(12分)下表为元素周期表的一部分,请参照元素①-⑨在表中的位置,用化学用语回答下列问题: 族 周期 IA 0 1 ① ⅡA ⅢA ⅣA ⅤA ⅥA ⅦA 2 ② ③ ④ 3 ⑤ ⑥ ⑦ ⑧ ⑨ (1)在①~⑨元素中,金属性最强的元素是 ,氧化物有两性的 元素是 。(均填元素符号) (2)元素⑦与元素⑧相比,⑧的非金属性较强,下列表述中能证明这一事实的是 a.常温下⑦的单质和⑧的单质状态不同 b....
【单选题】I’d like to eat out, but _________ I should be trying to save money .
【单选题】I’d like to eat out, but_________the other hand I should be trying to save money.
【判断题】阅读判断 Welcome to Jiajia Hotel! I’d like to introduce the hotel surroundings to you. There is a supermarket near our hotel. If you want to go to the supermarket, just go down the road, and take the firs...
【简答题】(用 元素符号 填空) IA 族只有 , IIA 族只有 , 能直接和氮作用生成氮化物。