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一、关于元素氧化值的确定氧化值又名氧化数。它是为了方便配平氧化还原反应方程式而提出的一个概念。氧化值可根据下列原则进行确定:(1)以 H=1,O=2作为推算其它元素氧化值的标准;(2)氧化值的正负可用元素电负性的大小加以判断,大者为负(-),小者为正(+);(3)相同原子间的化学键,因键两端的元素电负性相等,其氧化值定为零,如 C-C,C=C,H-H 等的氧化值均为零。由此类推,一切单质的氧化值都为零;(4)化合物分子中各元素氧化值的代数和等于零。
First, on the determination of elemental oxidation value Oxidation value, also known as oxidation number. It is a concept proposed for the convenience of grading the redox reaction equation. Oxidation value can be determined according to the following principles: (1) With H = 1, O = 2 as the standard to calculate the oxidation value of other elements; (2) The positive and negative oxidation values can be judged by the size of the element electronegativity, Negative (-), the smaller is positive (+); (3) The same atomic chemical bonds, due to the electronegativity of the elements at both ends of the same, the oxidation value is set to zero, such as CC, C = C, HH oxidation Values are zero. And so on, all the elemental oxidation values are zero; (4) the algebraic value of the oxidation value of each element in the compound molecule is equal to zero.