“卤素”中涉及到的元素及其化合物知识零散繁多.为了系统、熟练地掌握本章知识,可从卤素的“六性”入手.一、系统性以氯元素的单质及化合物为中心编织知识网络:二、相似性以卤素单质为例,其相似性表现有:1·单质分子均为双原子分子;2·均易溶于有机溶剂;3·跟氢气反应生成卤化 The knowledge of the elements and compounds involved in “halogen” is scattered. To systematically master the knowledge of this chapter, one can start with the “six sexes” of halogens. I. Systematic knowledge centering on the simple substance and compound of chlorine. : Second, the similarity to halogen simple substance, for example, the performance of the similarity are: 1 · single molecules are diatomic molecules; 2 · are easily soluble in organic solvents; 3 · reaction with hydrogen to generate halogenation