In the complex these atoms are each bound to one central atom and not to each other . 在络合物中,这些原子都和中心原子成键,而彼此不成键。
2.
In this model the arrangement of bonds around the central atom is considered to depend upon how many valence-shell electron pairs . 在这个模型中,认为围绕中心原子的化学键的排列取决于价层中电子对的数量。