基本概念和基本原理是化学知识的基石,它贯穿于初中化学的始终,指导着元素化合物等知识的学习.因此,复习好化学基本概念和原理,是正确掌握化学知识的关键.1.比较法复习化学概念切忌分割概念孤立地去理解.有些概念互相依存,如氧化与还原;有些概念非常近似,如化合反应与氧化反应; The basic concept and basic principle are the cornerstones of chemical knowledge. It runs through junior high school chemistry and guides the learning of elemental compounds. Therefore, reviewing the basic concepts and principles of chemistry is the key to mastering chemical knowledge correctly. 1. Comparison method Reviewing chemical concepts should not be divided to understand concepts in isolation. Some concepts are interdependent, such as oxidation and reduction; some concepts are very similar, such as chemical reactions and oxidation reactions;