一、从数学角度判断分子有无极性主要看分子中正负电荷的分布是否对称,而电荷分布情况又跟分子的形状有密切关系.因此,我们可以根据分子的形状先分析分子的对称性.若分子高度对称,则为非极性分子,反之为极性分子.像X2型的单质分子高度对称,属于非极性分子;AB型的二元化合 First, from the mathematical point of view to determine whether the molecular polarity is mainly to see whether the distribution of positive and negative charge in the molecule is symmetrical, but the charge distribution is closely related to the shape of the molecule. Therefore, we can first analyze the symmetry of the molecule according to the shape of the molecule. If the molecule is highly symmetric, it is a non-polar molecule, and vice versa is a polar molecule. Like the X2 type, the elemental molecule is highly symmetric and belongs to the non-polar molecule; AB type of binary combination