化学作为一门基础科学已成为中等学校教学计划中的重要组成部分。按照新编中学化学教学大纲和教科书的安排,在教学内容中,元素化学与理论化学份量之比约为六比四,它所涉及列的知识内容与工农业生产,国防建设,科学技术和日常生活有着密切的联系,对于我国在本世纪内实现四个现代化具有重要的意义。元素化学是学习化学的起点,是其它化学知识萌发的土壤。学习化学知识的开端是对个别重要的元素化合物的感知和认识,然后再去研究其它物质的组成、结构、性质变化及合成等。随着化学知识的 Chemistry as a basic science has become an important part of the teaching plan of secondary schools. In accordance with the arrangement of the new secondary school chemistry syllabus and textbooks, the ratio of elemental chemistry to theoretical chemistry in the teaching content is about six to four. It covers the knowledge content and industrial and agricultural production, national defense construction, science and technology and daily life. Life is closely linked and it is of great significance for China to achieve four modernizations in this century. Elemental chemistry is the starting point for learning chemistry, and it is the soil where other chemical knowledge germinates. The beginning of the study of chemical knowledge is the perception and recognition of individual important elemental compounds, followed by the study of the composition, structure, properties, and synthesis of other substances. With chemical knowledge