一、教材分析1.教材分析“氯气”是苏教版必修教材化学1专题2“从海水中获得的化学物质”第一单元“氯、溴、碘及其化合物”中的第一课时的学习内容。本节内容是“运用化学方法进行自然资源开发利用”这个宏大主题的第一节课,是元素及其化合物知识学习的开局之篇。因此,对元素及其化合物的学习具有示范和引领的作用。在此之前,在专题1“化学家眼中的物质世界”中,已经就化学研究的“分类方 First, the textbook analysis 1 teaching material analysis ”chlorine “ is the Sujiao Edition compulsory teaching chemistry a topic 2 ”from the seawater obtained chemical substances “ the first unit ”chlorine, bromine, iodine and its compounds “ The first class of learning content. This section is the first section on the grand theme of ”Using Chemical Methods to Exploit and Utilize Natural Resources,“ which is the beginning of the knowledge learning of elements and their compounds. Therefore, the study of elements and their compounds has a demonstration and leading role. Prior to this, in the topic 1 ”The material world in the eyes of chemists“, the ”classification of chemical research