一、对七七 概念物理变化化学变化没有生成其他物质的变化宏观现象物质的形状和状态改变微观解释物质分子没有改变,只是分子间隔发生改变 生成其他物质的变化发光、发热、变色、放出气体、生成沉淀等构成物质的分子发生变化、原子重新组合判断方法联系 要通过现象看本质,根据有 First, the concept of seven seven physical changes in chemical changes did not produce other substances in the change of macroscopic phenomena and changes in the shape of the material microscopic explanation of the material molecules did not change, but the molecular interval changes to generate other changes in the material light, heat, discoloration, gas evolution, The molecules that make up the precipitates and other constituent substances change, and the method of reassembling the judgments of atoms relies on the phenomenon to see the nature.