郭锁虎教师工作总结

B ?手性异构:具有完全相同的组成和原子排列的一对分子，如同左手2(下列能跟氢原子形成最强极性键的原子是 和右手一样互为镜像，在三维空间里不能重叠的现象。 ( ) ?手性分子:具有手性异构体的分子。 A(F B(Cl C(Br D(I ?手性碳原子:在有机物分子中，连有四个不同基团或原子的碳原子。答案 A worried parents sent to northern Jiangsu Dongtai. After the third army, first in the crash course in high school, learning radio operator, 1 years, Shen Decai just stayed there for 1 year, Pai's warehouse in the East. Two sons join the Communist force, the Elves are often an excuse to bother Shen Decai, but he silently endured, convinced that the Japanese lost, the day of victory will come. (17) Shen Wenqian late-night escorted Secretary ( ) 3(下列物质中，含离子键的物质是( )，由极性键形成的极性分子是 A(CO、HS B(CH、CH 22244( )，由极性键形成的非极性分子是( )，由非极性键形成的非极 C(Cl、CH D(NH、HCl 2223性分子是( )。 答案 B A(CO B(BrC(CaCl D(HO 22 22 解析 HS和NH、HCl都是含有极性键的极性分子,Cl是含有非极232答案 C D A B 性键的非极性分子,CO、CH是含有极性键的非极性分子,CH和24244(运用价层电子对互斥理论预测CCl、NH、HO的立体构型。 432 CH是含有极性键和非极性键的非极性分子。 22答案 CCl:正四面体形;NH:三角锥形;HO:“V”形。 432 题组二 分子极性和化学键极性的关系 5(下列叙述中正确的是 ( ) A(以非极性键结合起来的双原子分子一定是非极性分子 教学案例 B(以极性键结合起来的分子一定是极性分子 C(非极性分子只能是双原子单质分子 D(非极性分子中，一定含有非极性共价键 答案 A 解析 对于抽象的选择题可用反例法～以具体的物质判断正误。A项是正确的～如O、H、N等,B项错误～以极性键结合起来的分子不222 一定是极性分子～若分子构型对称～正负电荷重心重合～就是非极性分子～如CH、CO、CCl、CS等,C项错误～某些共价化合物如4242 HO、CH等也是非极性分子,D项错误～非极性分子中不一定含有2224 非极性键～如CH、CO。 42 6(下列各组分子中，都属于含极性键的非极性分子的是 worried parents sent to northern Jiangsu Dongtai. After the third army, first in the crash course in high school, learning radio operator, 1 years, Shen Decai just stayed there for 1 year, Pai's warehouse in the East. Two sons join the Communist force, the Elves are often an excuse to bother Shen Decai, but he silently endured, convinced that the Japanese lost, the day of victory will come. (17) Shen Wenqian late-night escorted Secretary 教学案例 教学案例 worried parents sent to northern Jiangsu Dongtai. After the third army, first in the crash course in high school, learning radio operator, 1 years, Shen Decai just stayed there for 1 year, Pai's warehouse in the East. Two sons join the Communist force, the Elves are often an excuse to bother Shen Decai, but he silently endured, convinced that the Japanese lost, the day of victory will come. (17) Shen Wenqian late-night escorted Secretary 请各位老师认真填写，于2月1日前交回教导处。 worried parents sent to northern Jiangsu Dongtai. After the third army, first in the crash course in high school, learning radio operator, 1 years, Shen Decai just stayed there for 1 year, Pai's warehouse in the East. Two sons join the Communist force, the Elves are often an excuse to bother Shen Decai, but he silently endured, convinced that the Japanese lost, the day of victory will come. (17) Shen Wenqian late-night escorted Secretary