化学的研究重点是物质的化学变化,对化学反应进行合理分类是研究化学的前提.在初中阶段我们根据反应物和生成物的类别以及反应前后物质种类的多少将化学反应划分为四种基本类型:化合、分解、置换、复分解.从微观上来看,这种划分还停留在原子、分子的水平上,未能更深入地揭示化学反应的本质,又由于原子结合形式的多样性,使得四种基本类型不能概括所有的化学反应,即使是初中化学常见的 The focus of chemical research is on the chemical changes of materials. The rational classification of chemical reactions is the premise of research chemistry. In the junior middle school stage, we classify chemical reactions into four basic types according to the types of reactants and products and the types of substances before and after the reaction. :Combination, decomposition, substitution, and metathesis. From the microscopic point of view, this division still stays at the level of atoms and molecules, failing to reveal the nature of the chemical reaction in more depth, and making the four kinds of species due to the diversity of atomic bonding forms. The basic types do not summarize all chemical reactions, even those common in junior high school chemistry.