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初中化学里所学习的化学基本概念主要有:分子、原子、元素、单质、化合物、原子量、分子量、元素符号、分子式、化学方程式、化合价等;化学基本定律有:物质不灭定律和定组成定律。我在实际工作中感到初学化学的学生掌握这些知识有相当大的困难。如不能经常地去巩固那些化学基本概念和定律,就不会收到好的教学效果。关于这个问题我愿意提出以下几点体会,并希望同志们多加批评指正。一、教师要首先掌握基本概念、定律与有关知识的内在联系如下图所示:在全部初中化学教材中都贯穿着原
The basic concepts of chemistry in junior high school chemistry include: molecules, atoms, elements, simple substances, compounds, atomic weight, molecular weight, elemental symbols, molecular formulas, chemical equations, valences, etc. The basic laws of chemistry include the law of immiscibility and the law of composition . It is quite difficult for me to feel that this kind of knowledge can be mastered by the students who are engaged in beginner chemistry in practical work. If you can not often consolidate those basic concepts and laws of chemistry, you will not receive good teaching results. I would like to raise the following points on this issue and hope that comrades will criticize and correct them more. First, teachers must first grasp the basic concepts, laws and the internal relations of knowledge as shown below: In all junior high school chemistry textbooks are used throughout the original