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物质的结构决定性质。化学键的种类和它的强弱是决定性质的主要因素。但是单从化学键还不能说明整个物质的性质,如物质的溶解度、熔沸点、颜色、硬度,以及电解质溶液的电离,盐类水合物的形成等,都与分子的极性结构有着密切的关系。在简单双原子分子中,键的类型与分子类型是一致的。如键是非极性键,则分子为非极性分子,如H_2、Cl_2、Br_2等。如键是极性键,则分子为极性分子,如HCl、H Br等。至于多原子分子是否具有极性,则必须
The structure of the material determines the nature. The type of chemical bond and its strength are the main factors that determine the nature. However, the chemical bond alone can not explain the properties of the entire material, such as the solubility of the material, the boiling point, the color, the hardness, the ionization of the electrolyte solution, the formation of the salt hydrate, and so on, all of which are closely related to the polar structure of the molecule. In a simple diatomic molecule, the type of bond is the same as the type of molecule. If the bond is a non-polar bond, the molecule is a non-polar molecule such as H2, Cl2, Br2, and the like. If the bond is a polar bond, the molecule is a polar molecule such as HCl, HBr, or the like. As for whether polyatomic molecules have polarity, they must