氧化数是中学化学老师在备课过程中势必要涉及到的一个问题。本文就如何理解氧化数的涵义以及氧化数同化合价、共价键数之间的区别和联系等问题作一讨论。一、氧化数概念的引入在十九世纪中叶,化合价的概念已引入到化学领域。当时,由于对物质分子结构的认识还不很清楚,因此化合价只是用来笼统地表示原子间的化合 Oxidation number is a problem that the middle school chemistry teacher must be involved in preparing for the class. This article discusses how to understand the meaning of oxidation number, as well as the differences between oxidation number valence and the number of covalent bonds. First, the introduction of the concept of oxidation number In the middle of the nineteenth century, the concept of valence has been introduced into the field of chemistry. At that time, because the understanding of the structure of the molecular structure was not yet very clear, the valence was only used to generalize the combination of atoms.