本课配套习题挑战模式1/5
单选题
难度系数:
1.下列关于碱金属元素的说法正确的是①原子结构的相同点是最外层电子数相同,都为1
②原子结构的不同点是随核电荷数的增加,电子层数增多,原子半径增大
③它们具有相似的化学性质,都是活泼金属
④它们都具有强还原性,在化合物中显+1价
⑤它们的化学性质有差别,从Li到Cs,失电子能力逐渐增强。
②原子结构的不同点是随核电荷数的增加,电子层数增多,原子半径增大
③它们具有相似的化学性质,都是活泼金属
④它们都具有强还原性,在化合物中显+1价
⑤它们的化学性质有差别,从Li到Cs,失电子能力逐渐增强。
A: ①③④ |
B: ①③⑤ |
C: ②④⑤ |
D: 全部 |
一次做对,真牛!
+5奖励规则>
- 提示1:5q2k57G75Z6L6aKY5Y+v5Lul5YWI5LuO5a655piT5o6o5pat55qE5YWl5omL77yM5YGa5o6S6Zmk5p2l6YCJ5oup44CC
- 答案:RA==
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本课配套习题挑战模式2/5
多选题
难度系数:
2.具有下列结构的原子一定属于碱金属的是
A: 最外层上只有一个电子 |
B: 最外层电子数为次外层电子数的一半 |
C: M层电子数为K层电子数的1/2 |
D: K层与L层电子数之和比M层与N层电子数之和大1 |
一次做对,真牛!
+5奖励规则>
- 提示1:6aKY5bmy6KaB5rGC55qE5piv4oCc5LiA5a6a4oCd5bGe5LqO56Kx6YeR5bGe55qE5piv77yM5oiR5Lus5L6/5YiG5p6Q5Zub5Liq6YCJ6aG577yM5om+5Ye65Y+N5L6L6YCQ5Liq5o6S6Zmk6ZSZ6K+v6YCJ6aG55bCx5Y+v5Lul5LqG44CC
- 答案:QyxE
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本课配套习题挑战模式3/5
单选题
难度系数:
3.下列关于碱金属的电子结构和性质的叙述中不正确的是
A: 碱金属原子最外层都只有一个电子,在化学反应中容易失去 |
B: 都是强还原剂 |
C: 都能在O2中燃烧生成过氧化物 |
D: 都能与水反应生成碱 |
一次做对,真牛!
+5奖励规则>
- 提示1:56Kx6YeR5bGe5YWD57Sg5LuO5LiK5Yiw5LiL77yM6YeR5bGe5oCn5aKe5by677yM5YyW5a2m5oCn6LSo5Lmf6LaK5p2l6LaK5rS75rO844CC
- 答案:Qw==
Q+mUmeivr++8jOmUguWcqOawp+awlOS4reeHg+eDp+S6p+eJqeaYr+awp+WMlumUgu+8iExpPHN1Yj4yPC9zdWI+T++8ie+8jOiAjOS4jeaYr0xpPHN1Yj4yPC9zdWI+TzxzdWI+Mjwvc3ViPuOAguagueaNrueisemHkeWxnuWFg+e0oOaAp+i0qOeahOmAkuWPmOaAp+mHkeWxnumUgueahOawp+WMlueJqeacgOeugOWNleOAgg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列关于碱金属元素的原子结构和性质的叙述不正确的是
A: 碱金属原子最外层都只有1个电子,在化学反应中容易失去 |
B: 碱金属单质都是强还原剂 |
C: 碱金属单质都能在氧气中燃烧生成过氧化物 |
D: 碱金属单质都能与水反应生成强碱 |
一次做对,真牛!
+5奖励规则>
- 提示1:56Kx6YeR5bGe6Ieq5LiK6ICM5LiL77yM6YeR5bGe5oCn6YCQ5riQ5aKe5by677yM5L2G5Zyo5rCn5rCU5Lit54eD54On55qE55Sf5oiQ54mp5piv5LiN5ZCM55qE44CC
- 答案:Qw==
56Kx6YeR5bGe6Ieq5LiK6ICM5LiL77yM6YeR5bGe5oCn6YCQ5riQ5aKe5by677yM5L2G5Zyo5rCn5rCU5Lit54eD54On55qE55Sf5oiQ54mp5piv5LiN5ZCM55qE77yM5L6L5aaCTGnnlJ/miJBMaTxzdWI+Mjwvc3ViPk/vvIzpkqDnlJ/miJBOYTxzdWI+Mjwvc3ViPk88c3ViPjI8L3N1Yj7vvIzpgInpoblD5LiN5q2j56Gu77yM5YW25L2Z6YCJ6aG56YO95piv5q2j56Gu55qE77yM562U5qGI6YCJQ+OAgg==
本课配套习题挑战模式5/5
单选题
难度系数:
5.下列是关于铷的结构和性质的判断,其中不正确的是
A: 铷与水反应比钠剧烈 |
B: 铷的原子半径比钠小 |
C: 铷的氧化物暴露在空气中易吸收CO2 |
D: 铷可作还原剂 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY6ICD5p+l56Kx6YeR5bGe5LiA5peP55qE6YCS5Y+Y6KeE5b6L5LiO55u45Ly85oCn44CC
- 提示2:56Kx6YeR5bGe5LiA5peP5LuO5LiK5Yiw5LiL6YeR5bGe5oCn5aKe5by677yM55Sx5q2k5Y+v5Lul5o6o5pat5YyW5a2m5oCn6LSo55qE5rS75rO856iL5bqm44CB5Y2V6LSo55qE6L+Y5Y6f5oCn5Y+Y5YyW44CC
- 答案:Qg==
56Kx6YeR5bGe5LiA5peP5LuO5LiK5Yiw5LiL6YeR5bGe5oCn5aKe5by677yM5Zug5q2k6ZO35LiO5rC05Y+N5bqU5q+U6ZKg5Ymn54OI77yM5bm25LiU6ZO35Y2V6LSo5Y+v5Lul5L2c6L+Y5Y6f5YmC77ybPGJyPumSoOeahOawp+WMlueJqeWcqOepuuawlOS4reaYk+WQuOaUtuS6jOawp+WMlueis++8jOmTt+eahOaAp+i0qOabtOS4uua0u+azvO+8jOWboOatpOmTt+eahOawp+WMlueJqeaatOmcsuWcqOepuuawlOS4reS5n+WuueaYk+WQuOaUtuS6jOawp+WMlueis++8mzxicj7nlLXlrZDlsYLotorlpJrvvIzljp/lrZDnmoTljYrlvoTotorlpKfjgILlm6DmraTpk7fnmoTnmoTljYrlvoTopoHlpKfkuo7pkqDjgIJC6aG56ZSZ6K+v44CC