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一、知识规律总结1.离子键与共价键的比较2、化学键与物质类别规律①只含非极性共价键的物质:同种非金属元素构成的单质,如 I_2、N_2、P_4、金刚石、晶体硅等。②只含有极性共价键的物质:一般是不同非金属元素构成的共价化合物。如 HCl、NH_3、SiO_2、CS_2等。③既有极性键又有非极性键的物质:如 H_2O_2、C_2H_2、CH_3CH_3、C_6H_6(苯)等。④只含有离子键的物质:活泼
First, the knowledge of law summary 1. Comparison of ionic bonds and covalent bonds, chemical bonds and substance categories 1 substances containing only non-polar covalent bonds: the same kind of non-metallic elements consisting of simple substances, such as I_2, N_2, P_4, diamond Crystal silicon and so on. 2 substances containing polar covalent bonds: Generally, they are covalent compounds composed of different non-metallic elements. Such as HCl, NH3, SiO2, CS2 and so on. 3 Substances with both polar and non-polar bonds: H2O2, C2H2, CH3CH3, C6H6 (benzene), etc. 4 substances containing ionic bonds: lively