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一、化合价的涵义中学化学中对化合价的定义为:一种元素一定数目的原子跟其它元素一定数目的原子化合的性质.由此可知:离子化合物中元素的化合价的数值,就是这种元素的一个原子得失电子的数目;失电子的原子带正电荷,这种元素原子的化合价是正价,反之则是负价;共价化合物里元素化合价的数值就是这种元素的一个原子跟其它元素的原子形成共用电子对的数目,电子对偏向哪种原子,哪种元素的原子就为负价,反之则是正价.从上述叙述可进一步知:元素的化合价就是元素的原子形成化合物时所表现出来的一种性质.
1. The meaning of valence The definition of valence in middle school chemistry is the property of a certain number of atoms in a certain number of atoms combined with other elements. It can be seen that the value of the valence of an element in an ionic compound is the value of this element. The number of electrons that an atom gains and loses; the atom that loses electrons has a positive charge. The valence of this element atom is a positive price, and vice versa is a negative value; the value of the elemental valence of a covalent compound is one atom of this element and the atom of another element. The number of common electron pairs to form, the atom to which the electron pair is biased, and the atom of which element is negative, and vice versa. It can be further known from the above description that the valence of an element is what the element’s atoms form when forming the compound. A property.