原子中的电子其电子云常有节面(Is 电子云除外)。例如处于2p_x 态的电子其电子云被 yz 平面分为两块,在 yz 平面上电子出现的几率为零,即 yz 平面为节面。于是常被提出下列问题:既然在节面上电子出现的几率为零,那么电子是怎样从一块电子云跑到另一块去的?对这个问题有各种不同回答。例如(1)有人认为这问题的提法本身就是欠妥的,也就是说这样的问题只能在经典力学中提出而不应在量子力学中提出;(2)另有人认为由于电子本身是有体积的,所 Electrons in an atom There are often nodal surfaces in an electron cloud (except Is clouds). For example, in the 2p_x state, the electron cloud is divided into two by the yz plane, and the probability of electron appearance in the yz plane is zero, that is, the yz plane is the nodal plane. So often the following questions are raised: How do electrons run from one cloud to another, since the chances of electrons appearing on the nodal plane are zero? There are different answers to this question. For example, (1) Some people think that the formulation of the question itself is flawed, that is to say such problems can only be raised in classical mechanics and should not be put forward in quantum mechanics; (2) Others think that the electrons themselves are The volume of the