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中学化学教学内容,大致可分两部分:一是基础理论,如物质结构、电离、化学平衡等;二是元素及化合物知识。前者虽然比较抽象,不易理解,但逻辑性强,条理清楚,学了以后对一些化学问题能初步地从知其然到知其所以然,例如学生初学化合价时往往不知道为什么有的元素是一价,有的是二价;学习了物质结构理论,才感到“哦,原来如此。”因此,钻研起来的劲头比较大。元素及化合物知识,在中学教材中占1/2以上,看起来是
The contents of chemistry teaching in middle schools can be roughly divided into two parts: First, basic theory, such as material structure, ionization and chemical balance, etc. Second, knowledge of elements and compounds. Although the former is relatively abstract and difficult to understand, it is logical and well-organized. After learning, some chemical problems can be known from the beginning to the end. For example, students often do not know why some elements are a price when they begin to learn valence. Some of them are bivalent; they learned the theory of the structure of matter and only then felt “Oh, it turned out to be the case.” Therefore, the momentum for studying is relatively large. The knowledge of elements and compounds accounted for more than 1/2 in high school textbooks. It seems that