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元素化合物知识是中学化学知识的重要组成部分,是认识化学物质、联系生活实际的重要内容之一。但学生在面对元素化合物知识时往往感到难以理解,死记硬背化学方程式,却不会应用。而教师通过大量的化学实验,希望引起学生的兴趣,但是收效甚微。究其原因,学生在学习过程中并未具备基本的自主探究的意识和分析解决问题的能力,教师只有通过行之有效的课堂教学手段才能改变这种局面。钠及其化合物的介绍是教学重点和难点,同时为学
Knowledge of elementary compounds is an important part of chemical knowledge in middle schools, and is one of the important contents of understanding chemical substances and linking life with reality. However, students often find it hard to understand when it comes to the knowledge of elemental compounds. However, they can not apply the rote formulas. The teachers through a large number of chemical experiments, hoping to arouse the interest of students, but with little success. The reason is that students do not have the basic awareness of self-exploration and the ability to analyze and solve problems in the learning process. Teachers can only change this situation through effective classroom teaching. The introduction of sodium and its compounds is a teaching focus and difficulty, at the same time as learning