我们可以想象比较一下钾离子，与钠离子，它们都同样带有正一价的电荷。

So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.

youdao

从键价的概念出发，对氧化物超导体中铜离子的有效电荷进行了计算。

Effective valences of copper in superconducting oxides were calculated from the concept of bond valence.

youdao

基于价键电荷模型计算了碳纳米管的结合能随管径和手性角的关系。

Based on a model of charges at bonds, the binding energy with respect to diameter and chiral Angle of single-wall carbon nanotube have been studied.

youdao

So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.

我们可以想象比较一下钾离子,与钠离子，它们都同样带有正一价的电荷。

麻省理工公开课 - 化学原理课程节选