碳族元素是从非金属性向金属性变化规律相当典型的一族元素,这对复习巩固周期律和物质结构理论知识有重要的作用。对碳及其化合物,在初中已经有较多地学习,本章着重学习硅及其化合物。要学好本章知识,笔者认为关键在于“三抓”。一、抓对比,学知识1 .由于学生对碳及其化合物的 Carbon group elements are a family of elements that vary from non-metallic to metallic. This is important for reviewing the consolidating knowledge of cyclical law and material structure theory. For carbon and its compounds, there have been more studies in junior high school. This chapter focuses on learning about silicon and its compounds. To learn this chapter of the knowledge, the author believes that the key lies in “three catches.” First, grasp the contrast and learn knowledge 1. Because of students’ carbon and its compounds