题目

指出下列原子的杂化轨道类型及分子的结构式、空间构型。(1)CO2分子中的C采取______杂化，分子的结构式为______，空间构型呈______；(2)CH2O中的C采取______杂化，分子的结构式为______，空间构型呈______；(3)H2S分子中的S采取______杂化，分子的结构式为______，空间构型呈______。 答案：【答案】sp O=C=O 直线形 sp2 平面三角形 sp3 V形 【解析】根据价层电子对互斥理论确定分子中原子杂化方式及分子空间构型，价层电子对个数=配原子个数+孤电子对个数，据此分析解答。(1)CO2 分子中C原子的价层电子对数=2+4-2×2=2，2分子的立体构型为直线形，C原子采取sp杂化，在CO2分子中C原子与两个O原单词拼写：根据所给汉语或首字母写出单词的正确形式。（答案写在下方横线处,共10分)小题1:The thundering clouds held me __________ (完全地) in their power.小题2:I am only able to look at nature through dirty  c_________ hanging before very dusty windows.小题3:When people use words and e_________ different from the “standard language”, it is called a dialect.小题4:_______ (本地的) English speakers can understand each other.小题5:After ________(毕业) from college, we finally got the chance to take a bike trip.小题6:She gave me a _________(坚定的) look.小题7:As I lay ________(在……的下面) the stars I thought about how far we had already travelled.小题8:In the city, the water pipes in some buildings cracked and b_______.小题9:She bought an expensive mountain bike and then she  p_________ me to buy one.小题10:He strongly believed in the three p________: nationalism; people’s rights; people livelihood.