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化学键就是指分子和晶体中原子或离子间的强烈相互作用。不同的分子或晶体,它们赖以形成的强烈相互作用的性质可能是不同的,也就是它们内部存在的化学键可能是不同的。典型的化学键有离子键、金属键和共价键。 离子键是通过正负离子间的静电作用而形成的化学键,因此离子键可用经典静电定律来描述。在金属晶体中,在金属正离子品格构成的周期场中运动的离域电子与品格正离子的作用称金属键。金属键理论又分为“自由电子模型”和金属能带理论等。
A chemical bond refers to the strong interaction between a molecule and an atom or ion in a crystal. Different molecules or crystals, the strong interaction they may be formed on the nature may be different, that is, their internal chemical bonds may be different. Typical chemical bonds are ionic bonds, metal bonds and covalent bonds. Ionic bond is a chemical bond formed by electrostatic interaction between positive and negative ions, so ionic bond can be described by classical electrostatic law. In metal crystals, the role of the delocalized electrons and the positive ions that move in the periodic field formed by the character of the metal cation is called a metal bond. Metal key theory is divided into “free electron model” and metal band theory.