In the preceding section we discussed the valence bond ( vb) or electron-pair theory of bonding.
在前面一节，我讨论了价键法&电子配对理论。
2
By calculating the number of valenceelectron shell, we can gain the geometry array of the electronic pair, and then judge the molecular structures.
计算出价层电子对数，得到电子对的几何排布，从而判断出分子的几何构型。
3
This paper analyzes shell electronpair repulsion theory , valence-bond theory and molecular orbital theory on molecular structure of noble gas compounds.