在教学过程中,发现部分同学误认为极性键形成的分子都是极性分子。这种错误的产生主要是对化学键的极性与分子的极性的概念和关系没搞清楚。因此,我们就如何正确判断非极性分子和极性分子谈点看法。 我们可以设想在任何一个分子中都可以找到一个正电荷重心和一个负电荷重心。也就是说,对于任何一个分子,我们可以设想它的正电荷集中于一点,称为正电荷重心;同理,可以设想它的负电荷集中于一点,称为负电荷重 During the teaching process, it was found that some students mistakenly thought that the molecules formed by polar bonds were polar molecules. This error is mainly caused by the lack of clarity on the concept and relationship between the polarity of chemical bonds and the polarity of molecules. Therefore, we talked about how to correctly judge nonpolar molecules and polar molecules. We can imagine that a positive charge center of gravity and a negative charge center of gravity can be found in any one molecule. In other words, for any one molecule, we can assume that its positive charge is concentrated at one point, which is called positive charge center of gravity; similarly, it can be assumed that its negative charge is concentrated at one point, which is called negative charge weight.