本课配套习题挑战模式1/5
单选题
难度系数:
1.共价键产生极性的根本原因是
A: 成键原子之间原子核吸引共用电子对能力不同所造成的 |
B: 成键原子是由同种元素不同核素组成的 |
C: 成键原子间一种原子带部分正电荷,一种原子带部分负电荷所造成的 |
D: 成键原子间形成共用电子对多少所造成的 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWx5Lu36ZSu5piv5Lik5Liq5Y6f5a2Q5LmL6Ze05b2i5oiQ5YWx55So55S15a2Q5a+577yM5Zyo6ICD6JmR5p6B5oCn5pe26Ieq54S25bqU6K+l5LuO5YWx55So55S15a2Q5a+55YWl5omL44CC
- 答案:QQ==
5YWx5Lu36ZSu55qE5p6B5oCn5piv55Sx5LqO5LiN5ZCM5YWD57Sg5Y6f5a2Q5qC45a+55YWx55So55S15a2Q5a+555qE5ZC45byV5Yqb55qE5LiN5ZCM5byV6LW355qE44CC
本课配套习题挑战模式2/5
单选题
难度系数:
2.在共价化合物中元素化合价有正负,其主要原因是
A: 电子有得失 |
B: 共用电子对有偏移 |
C: 电子既有得失又有电子对偏移 |
D: 含有多种非金属元素 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWx5Lu36ZSu5piv5Lik5Liq5Y6f5a2Q5LmL6Ze05b2i5oiQ5YWx55So55S15a2Q5a+577yM5Zyo6ICD6JmR5p6B5oCn5pe26Ieq54S25bqU6K+l5LuO5YWx55So55S15a2Q5a+55YWl5omL44CC
- 答案:Qg==
55Sx5LqO5Y6f5a2Q5qC45a+55YWx55So55S15a2Q5a+555qE5ZC45byV5Yqb5LiN5ZCM77yM5L2/5b6X55S15a2Q5a+55pyJ5YGP56e777yM5b2i5oiQ5LqG5bim55S15oCn55qE5beu5byC44CC
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列物质全部以共用电子对成键的是
A: HF |
B: Ca(OH)2 |
C: CaCl2 |
D: NH4NO3 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Lul5YWx55So55S15a2Q5a+55oiQ6ZSu77yM6KGo56S65b2i5oiQ55qE5piv5YWx5Lu36ZSu44CC
- 答案:QQ==
6Z2e6YeR5bGe5LmL6Ze05b2i5oiQ55qE5YyW5a2m6ZSu5aSn5aSa5Li65YWx5Lu36ZSu77yM6YeR5bGe5LiO6Z2e6YeR5bGe5oiW6ZO15qC556a75a2Q5LiO6YW45qC55b2i5oiQ55qE5YyW5a2m6ZSu44CCPGJyPuaVhemAieaLqUHpobnjgII=
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列分子含有的电子数目与HF相同,且只有两个极性共价键的是
A: CO2 |
B: N2O |
C: H2O |
D: CH4 |
一次做对,真牛!
+5奖励规则>
- 提示1:6aKY55uu5Lit55qE6KaB5rGC5piv5ZCr5pyJ55S15a2Q5pWw77yM5q+P5Liq5Y6f5a2Q55qE55S15a2Q5pWw562J5LqO5a6D55qE5qC455S16I235pWw44CC
- 提示2:5p6B5oCn5YWx5Lu36ZSu5piv5oyH5LiN5ZCM5Y6f5a2Q5LmL6Ze05b2i5oiQ55qE5YWx5Lu36ZSu44CC
- 答案:Qw==
5YiG5a2Q5ZCr5pyJ55S15a2Q5pWw5LiOSEbnm7jlkIzvvIzljbMxMOeUteWtkO+8jEPjgIFE5ruh6Laz77yM5LiU5YiG5a2Q5YaF5Y+q5pyJ5Lik5Liq5p6B5oCn6ZSu77yMQ0g8c3ViPjQ8L3N1Yj7mnIk05Liq5p6B5oCn6ZSu44CC
本课配套习题挑战模式5/5
多选题
难度系数:
5.下列各组物质中,化学键类型相同的是
A: H2O、NH3 |
B: Na2O 、MgO |
C: NaCl、KOH |
D: Na2S、H2S |
一次做对,真牛!
+5奖励规则>
- 提示1:6Z2e6YeR5bGe5LmL6Ze05b2i5oiQ55qE5YyW5a2m6ZSu5aSn5aSa5Li65YWx5Lu36ZSu77yM6ICM6YeR5bGe5LiO6Z2e6YeR5bGe44CB6ZO15qC55LiO6YW45qC55LmL6Ze05b2i5oiQ55qE5YyW5a2m6ZSu5aSn5aSa5Li656a75a2Q6ZSu44CC
- 答案:QSxC
QemAiemhuemDveaYr+WFseS7t+mUru+8mzxicj5C6YCJ6aG56YO95piv56a75a2Q6ZSu77ybPGJyPkPkuK1OYUNs5Y+q5pyJ56a75a2Q6ZSu77yMS09I5pei5pyJ56a75a2Q6ZSu5Y+I5pyJ5YWx5Lu36ZSu77ybPGJyPkTkuK1OYTxzdWI+Mjwvc3ViPlPlj6rmnInnprvlrZDplK7vvIxIPHN1Yj4yPC9zdWI+U+WPquacieWFseS7t+mUruOAgg==