本节教材是在学生已经学习了原子结构、元素周期律、化学平衡、氧化还原反应和离子反应等理论知识及部分元素化学知识的基础上,对元素化学的进一步学习。该教学设计是从学生已有的知识和经验出发,力求培养学生主动运用化学理论知识指导元素化学的学习能力,帮助学生轻松自然地学习新的化学知 This textbook is a further study of elemental chemistry based on the theoretical knowledge of the atom structure, elemental periodicity, chemical equilibrium, redox reaction and ion reaction as well as the chemical knowledge of some elements. The teaching design is based on the students’ existing knowledge and experience, and strive to train students to take the initiative to use chemical theory to guide the elemental chemistry learning ability to help students easily and naturally learn new chemical knowledge