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在初中化学阶段,化合价是一个十分重要的化学概念,要求学生必须能够正确的理解和应用.为了帮助有关化合价知识的教与学,现就有关化合价的问题浅析如下. 一、关于化合价的问题简答1.化合价的本质是什么? 答:元素的化合价就是该元素的一个原子跟其他元素的原子相化合时得失电子或共用电子对的数目.化合价有正有负,其正负是由电子的得失或电子对的偏移来决定的,所以在任何化合物中,各种元素的正负化合价的代数和都为零.
In the chemical stage of junior high school, valence is a very important chemical concept that requires students to be able to understand and apply correctly. To help with the teaching and learning of valence knowledge, the following is a brief discussion of valence problems. I. Questions on valence Short answer 1. What is the nature of valence? A: The valence of an element is the number of lost or lost electrons when an atom of that element is combined with the atoms of other elements. The valence is positive and negative, and the valence is electronic. The gain or loss of the electron or the pair of electrons is determined, so in any compound, the algebraic sum of the positive and negative valences of various elements is zero.