分子和原子的知识在教科书的地位及今后学习化学的重要性是显而易见的,也是学生学习化学由易变难的一个转折点,分子和原子是初中学生初次接触到的微小粒子,在此之前只有一些微观现象的感性认识,没有任何理性认识,通过学习分子和原子的知识 The knowledge of molecules and atoms is evident in the status of textbooks and the importance of learning chemistry in the future. It is also a turning point for students to learn chemistry by becoming more and more difficult. Molecules and atoms are tiny particles that junior high school students come into contact with for the first time, Sensitive understanding of micro-phenomena, without any rational understanding, by learning the knowledge of molecules and atoms