中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.下列有关碱金属的说法中，不正确的是
| A: ⅠA族元素都是碱金属元素 |
| B: K的还原性强于Na |
| C: Na和Na+灼烧时都能使火焰呈黄色 |
| D: Na在空气中燃烧时生成Na2O2 |
一次做对，真牛！
+5奖励规则>
- 提示1：5pys6aKY5Lit6Jm954S25ZCO6Z2i5LiJ5Liq6YCJ6aG55Yab6LS556Kx6YeR5bGe55qE5YyW5a2m5oCn6LSo77yM5Y205Y+v5Lul6YCa6L+H4oWgQeaXj+eahOe7k+aehOmAieaLqeWHuuato+ehruetlOahiOOAgg==
- 答案：QQ==
4oWgQeaXj+S4remZpOS6hueisemHkeWxnuWFg+e0oOWklu+8jOi/mOacieS4gOS4queJueauiueahOWFg+e0oOKAlOKAlEjjgILlm6DmraRB6aG56ZSZ6K+v77ybPGJyPuaVhemAieaLqUHpobnjgII=
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列叙述错误的是
| A: 随着电子层数增多，碱金属的原子半径逐渐增大 |
| B: 碱金属具有强还原性，它们的离子具有强氧化性 |
| C: 碱金属单质的熔沸点随着核电荷数的增大而降低 |
| D: 在自然界中，碱金属元素都以化合态存在 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rOo5oSP5Yy65YiG6YeR5bGe5Y2V6LSo55qE6L+Y5Y6f5oCn5LiO5YW256a75a2Q55qE5rCn5YyW5oCn44CC6Iul5Y2V6LSo55qE6L+Y5Y6f5oCn6L6D5by677yM6YKj5LmI5a6D55qE56a75a2Q55qE5rCn5YyW5oCn5L6/6L6D5byx44CC
- 答案：Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.下列有关碱金属元素的性质，从上到下递变规律正确的是
| A: 金属性逐渐减弱 |
| B: 化合价逐渐升高 |
| C: 失电子能力逐渐增强 |
| D: 最高价氧化物对应的水化物碱性逐渐减弱 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Zub5Liq6YCJ6aG55Lit55qE6YeR5bGe5oCn44CB5aSx55S15a2Q6IO95Yqb5LiO5pyA6auY5Lu35rCn5YyW54mp5a+55bqU55qE5rC05YyW54mp56Kx5oCn5LiJ56eN5oCn6LSo5piv5ZCM5q2l55qE77yM5Y+v5Lul5L6d5o2u6YeR5bGe5oCn5p2l5Yik5pat44CC
- 提示2：5YWD57Sg55qE5YyW5ZCI5Lu35LiO5pyA5aSW5bGC55S15a2Q55u45YWz44CC
- 答案：Qw==
56Kx6YeR5bGe5YWD57Sg5LuO5LiK5Yiw5LiL77yM5aSx55S15a2Q55qE6IO95Yqb6YCQ5riQ5aKe5by677yM5Zug5q2k6YeR5bGe5oCn5aKe5by677yM5pyA6auY5Lu35rCn5YyW54mp5a+55bqU55qE5rC05YyW54mp56Kx5oCn5Lmf5aKe5by677yMQeOAgUTplJnor6/vvIxD5q2j56Gu77ybPGJyPuWQjOS4gOS4u+aXj+eahOacgOWkluWxgueUteWtkOaVsOebuOWQjO+8jOWboOatpOWMluWQiOS7t+ebuOWQjO+8jELplJnor6/jgII8YnI+57u85LiK77yM6YCJ5oupQ+mhueOAgg==
本课配套习题挑战模式4/5
单选题
难度系数：
4.铷是一种碱金属元素，对其化学性质的推断，正确的是①铷的熔点比钾高②氯化铷水溶液的pH=7 ③RbOH的碱性比NaOH强
④铷没有共价化合物 ⑤铷可以从FeCl3溶液中置换出铁
④铷没有共价化合物 ⑤铷可以从FeCl3溶液中置换出铁
| A: ②③④ |
| B: ①②③④ |
| C: ②③④⑤ |
| D: ①②③④⑤ |
一次做对，真牛！
+5奖励规则>
- 提示1：56Kx6YeR5bGe5YWD57Sg5LuO5LiK5Yiw5LiL77yM6YeR5bGe5oCn6YCQ5riQ5aKe5by677yM55u45YWz5LiA57O75YiX5oCn6LSo5Y+v5Lul5Lul5q2k5o6o5rWL5Ye644CC
- 提示2：5rOo5oSP6ZO355qE6YeR5bGe5oCn6Z2e5bi45by677yM5LiO5rC05Y+N5bqU6L6D5Li65Ymn54OI44CC
- 答案：QQ==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.下列关于碱金属的描述正确的是
| A: 碱金属都可以保存在煤油里 |
| B: 硬度小、密度小、熔点低 |
| C: 在空气中加热均可生成多种氧化物 |
| D: 碱金属与水反应，均漂在水上 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC85aSW5rOo5oSP77yM6YeR5bGe6ZSC55qE5a+G5bqm5bCP5LqO54Wk5rK544CC
- 提示2：TGnkuI5PPHN1Yj4yPC9zdWI+5Y+N5bqU5Y+q55Sf5oiQTGk8c3ViPjI8L3N1Yj5P
- 提示3：6ZO344CB6ZOv55qE5a+G5bqm5Z2H5aSn5LqOMWfCt2NtPHN1cD4tMzwvc3VwPg==
- 答案：Qg==
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
