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一、本章的教学目的: 根据中学化学教学大纲的要求及教材内容,本章的教学目的,应有下列几点: 1.理解物质不灭定律和定组成定律; 2.熟悉化学方程式所表示的意义和写法;会用分子式及化学方程式作简单的重量计算,懂得计算的道理; 3.理解化合价的意义;能根据化合物的组成确定其中各元素的化合价,根据化合价写出简单的分子式。二、本章的重要性: 1.本章两定律为研究化学的基本根据,是一切化学反应所遵循的理论;学习了物质不灭定律和定
First, the purpose of teaching in this chapter: According to the requirements of secondary school chemistry syllabus and teaching materials, the purpose of this chapter should have the following points: 1. Understand the law of immortality and the law of composition; 2. Familiar with the meaning of the chemical equation And writing; will use formulas and chemical equations for simple weight calculation, understand the truth of the calculation; 3. Understand the meaning of valence; according to the composition of the compounds to determine the valence of each element, according to valence write a simple formula. Second, the importance of this chapter: 1. The two laws of this chapter are the basic basis for the study of chemistry, the theory followed by all chemical reactions; study the law of immortality of matter