一、教材分析本节教材包含两块内容:其一是在学生已经接触了碳、硅、氮、氧、硫、氯等多种典型非金属元素的基础之上,作为对钠、铁、镁等金属较零散知识的补充,第一次较系统研究金属元素及其典型化合物的性质,为后续元素周期律、元素周期表的学习奠定了一定的感性基础;其二是按照材料的分类,在了解了无机非金属材料之后,陆续学习金属材料和各种复合材料,主要介绍了铝、铁、金、银、铜等金属及其合金材料的用途, First, the textbook analysis This section consists of two teaching materials: First, the students have been exposed to carbon, silicon, nitrogen, oxygen, sulfur, chlorine and other typical non-metallic elements based on the as sodium, iron, magnesium For the first time, the properties of metal elements and their typical compounds were studied systematically for the first time, which laid a foundation for the follow-up study of the periodic law and the periodic table of the elements. The other is that according to the classification of materials, After learning about inorganic non-metallic materials, they have successively studied metal materials and various composite materials, and mainly introduced the use of metals such as aluminum, iron, gold, silver and copper and their alloy materials,