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一、本章在全书中的地位本章比较集中地介绍了一些化学基本概念、一些化学用语,初步建立原子、分子、元素、单质、化合物等概念;对原子的内部结构建立一个极为初步的轮廓;在认识相对原子质量,了解元素符号含义和学会读法、写法的基础上理解化学式和相对分子质量的含义,并初步掌握有关化学式的计算技能。
First, the status of this chapter in the book This chapter introduced a number of basic concepts of chemistry, some chemical terms, the initial establishment of the concept of atoms, molecules, elements, simple substances, compounds, etc.; to establish an extremely preliminary outline of the internal structure of the atom; Understand the relative atomic mass, understand the meaning of the element symbol, learn the meaning of chemical formula and relative molecular mass on the basis of reading and writing, and initially grasp the computational skills of the chemical formula.