论文部分内容阅读
初中化学课本指出:“元素符号、分子式和化学方程式是用来表示元素、物质分子组成和物质的化学反应的化学用语,它是学习化学的重要工具。”化学用语教学是整个初中化学教学的基础,是初中化学起始阶段教学的重要一环。为此,谈谈自己的看法: 一、以大纲为准,吃透教材,统筹安排化学用语的教学。初中化学用语包括元素符号、分子式、化学方程式、电子式、原子结构简图等等。教学中应突出化学用语的主要部分,即元素符号、分子式和化学方程式的教学,同时也适当地介绍了其它内容,如原子结构示意图(包括离子结构示意图)等。由于初中化学起始阶段的教材化学用语介绍过于集中,学生难以接受。分子式和化学方程式又出现在章与章之间,坡度太大,分布不均,学生难以适应。因
Junior high school chemistry textbooks point out that “elemental symbols, molecular formulae, and chemical equations are chemical terms used to represent the chemical reactions of elements, material composition, and matter. It is an important tool for learning chemistry.” Chemistry teaching is the foundation of chemistry teaching throughout junior middle school. , is an important part of junior middle school chemistry teaching. To this end, talk about your own views: 1. Take the outline as the standard, thoroughly understand the teaching materials and co-ordinate the teaching of chemical terms. Junior chemistry terminology includes elemental symbols, molecular formulae, chemical equations, electronic formulas, schematic diagrams of atomic structures, and so on. Teaching should highlight the main parts of chemical terms, namely the teaching of elemental symbols, molecular formulae and chemical equations, and also introduce other contents, such as atomic structure diagrams (including ion structure diagrams), etc., as appropriate. Due to the overly concentrated introduction of chemical terminology for teaching materials at the initial stage of junior high school chemistry, it is difficult for students to accept it. Molecular formulae and chemical equations appear again between chapters and chapters. The gradient is too large and unevenly distributed. Students find it difficult to adapt. because