化学基本概念反映化学事实的本质属性,是学习的基础。同系物、同分异构体、同一物质、同素异形体、同位素是有机化学中几个经常用到的概念,也是同学们经常混淆的概念。下面就对这几个概念的区别加以详细的论述。一、同系物:分子式不同,结构相似,在分子组成上相差若干个“—CH2—”原子团的化合 The basic concept of chemistry reflects the essential attributes of chemical facts and is the basis for learning. Homologs, isomers, the same substance, allotropes, and isotopes are some of the frequently used concepts in organic chemistry, and are also concepts that students often confuse. The differences between these concepts are discussed in detail below. First, homologues: different molecular formulas, similar structures, differences in the molecular composition of a number of “-CH2 - ” combination of atomic groups