## Resolution about the Controversial Issues of Oxidation Number in Teaching

Zhang Ying, Quan Xinjun,

 基金资助: 吉林大学本科教学改革研究项目.  2019XYB081

Abstract

Starting with the definition of oxidation number and the development of its concept, the controversial issues in the teaching of oxidation number were discussed in this paper, and the rule that the positive oxidation number of the element should be less than or equal to the total numbers of valence electrons of the atom was put forward to determine the oxidation number. Additionally, the calculation of oxidation number in the compounds with complex structure and unknown structure has been resolved.

Keywords： Oxidation number ; Controversial issue ; Supplementary rule

Zhang Ying. Resolution about the Controversial Issues of Oxidation Number in Teaching. University Chemistry[J], 2020, 35(8): 103-106 doi:10.3866/PKU.DXHX201908013

## 6 结论

(1)从本质上看，氧化数反映了成键两原子间电子偏移的方向和数量，是与结构有关的性质；

(2)从计算上看，氧化数由化学式直接计算得出，不依赖于结构；

(3)为使得出的氧化数与结构相吻合，确定氧化数的规则应补充一条：元素的正氧化数应小于或等于其外围电子的总数。这对于结构比较复杂或结构未知的化合物中元素氧化数的确定具有重要意义；

(4)二元含氧化合物中氧原子的氧化数是否等于−2，取决于电子供求关系。

## 参考文献 原文顺序 文献年度倒序 文中引用次数倒序 被引期刊影响因子

Johnson O. C. Chem. News 1880, 42, 51.

Glasstone S. J. Chem. Educ. 1948, 25 (5), 278.

Pauling, L.; Pauling, P. Chemistry. W. H. FREEMAN AND COMPANY: New York, USA, 1975; pp. 185–187.

How to Find Oxidation Numbers. [2019-09-03]. https://www.wikihow.com/Find-Oxidation-Numbers.

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