一、全面透彻地理解化学概念、原理初中化学的概念、原理是化学知识系统中的重要组成部分,是化学学习的难点,也是重点.只有掌握好每个概念、原理,才能做到逐步深入,融会贯通.例如第二章讲述的纯净物、混合物、单质、化合物、氧化物等概念,必须透彻地把握它们的内涵,并认真地区分其异同.通过概念的理解,在宏观上,我们便可明确纯 First, a thorough and thorough understanding of the concepts and concepts of chemistry The concept and principle of junior chemistry is an important part of the chemical knowledge system. It is a difficult and important point for chemistry learning. Only by grasping each concept and principle can we gradually deepen it. Blending. For example, concepts such as pure materials, mixtures, simple substances, compounds, and oxides described in the second chapter must be thoroughly grasped of their connotations and carefully distinguish their similarities and differences. Through conceptual understanding, we can clearly understand macroscopically. pure