1、分子和原子最大的不同点是 :在化学反应里 ,分子可分 ,而原子则不可分。所以原子才是在化学反应中不能再分的粒子 ,即原子是化学变化中的最小粒子。2、元素是一个宏观概念 ,而分子、原子则是一个微观概念。故元素只能讲“种”而不能说“个” ,而分子和原子则既讲“种”也讲 1. The biggest difference between molecules and atoms is that in chemical reactions, molecules can be divided and atoms are inseparable. So atoms are particles that cannot be separated in a chemical reaction, that is, atoms are the smallest particles in a chemical change. 2. Elements are a macro concept, while molecules and atoms are a microscopic concept. Therefore, the element can only say “species” but not “one”, while the molecules and atoms say “species” and also