一、抓理论带动《氮和磷》的学习 学习本章用“原子结构,元素周期律,分子结构和化学键”等理论知识进行指导,是成功之道。因此要紧紧抓住氮族元素的原子结构上的相似性和递变性,深入认识氮族元素在性质上的相似性和递变性,紧紧把握住“位—构—性”的关系,力争从结构推性质。例如氨可以从N—H极性强能形成氢键,使氨的沸点高于磷化氢的沸点,使氨易液化、极易溶于水;从N可 First, Grasping the Theory to Drive the Learning of Nitrogen and Phosphorus Learning This chapter is guided by theoretical knowledge such as “atom structure, periodicity of the elements, molecular structure, and chemical bonds” and is the road to success. Therefore, we must firmly grasp the similarity and transformation of the atomic structure of the nitrogen elements, and deeply understand the similarity and transition of nature of the nitrogen elements, and firmly grasp the relationship of “bit-structure-nature” and strive to Structural properties. For example, ammonia can form hydrogen bonds from the strong polarity of N-H, so that the boiling point of ammonia is higher than the boiling point of phosphine, making ammonia easily liquefiable and easily soluble in water;