本单元共三章,即原子结构、分子结构与化学键、元素周期表。这是化学中的“物质结构”部分。它主要是揭示物质的微观结构与物质性质间的内在联系。第五章原子结构一、目的要求通过了解原子的组成、原子核外电子的排布规律,明确元素性质的不同是由于原子内部结构不同而引起的;元素性质的周期性变化是原子结构(核外电子排布)周期性变化的必然结果。具体要求: 1、了解原子的组成; The unit consists of three chapters, namely the atomic structure, molecular structure and chemical bonds, the periodic table. This is the “material structure” part of chemistry. It mainly reveals the internal relations between the microstructure and the material properties of matter. The fifth chapter atomic structure First, the purpose of the request by understanding the atomic composition, atomic arrangement of electrons outside the law, a clear element of the nature of the difference is due to the internal structure of the atoms caused by different; periodic changes in the nature of the element structure of the atomic (nuclear Electronic arrangement) the inevitable result of cyclical changes. Specific requirements: 1, to understand the composition of the atom;