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在初三化学中,有许多新接触到的化学概念,概念是化学基础知识的重要部分.理解基本概念是学好初三化学的关键.但是,由于初三学生对化学的了解很少,对他们来说化学这门起始学科,刚开始两个单元还好,都是识记的内容,一学到元素、分子、原子、化合价这些抽象的内容,就很模糊,初学头脑很晕.初三又是紧张的一年,各个学科内容多,任务重,因此,在化学学习过程中能以最简单的方式弄清楚概念,是非常可贵的.初三教材上的有些概念已经被简化,用高中的知识解释可
In the first three days of chemistry, there are many new exposure to the chemical concept, the concept of chemical basic knowledge is an important part of the basic concepts to understand the key to learning the first three days of chemistry.But, as junior students have little knowledge of chemistry, to them Chemistry is the beginning of this discipline, the beginning of the two units fortunately, are the content of the memorial, a learned elements, molecules, atoms, valence these abstract content, it is very vague, beginner mind very dizzy. It is also a tense year with many subjects and heavy tasks, so it is very valuable to know the concept in the simplest way in the course of chemistry learning. Some concepts in the first three textbooks have been simplified, Knowledge can explain