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人们定义元素的氧化数,是为了表示某一元素在化合物中氧化态特征的一种方便的概念。氧化数既代表元素在化合物中的特征氧化态、又是化学上常用的方便概念,其方便之处是体现了氧化数既可为正值,也可为负值,既可为“0”值,也可为分数。因此用氧化数,而不用电子得失去进行氧化还原反应(以下简称氧还反应)的教学,有助于学生记忆和掌握,同时也便于教师教学。氧化数的概念经历过一个由浅入深,由低级到高级,由定义不严
It is a convenient concept that people define the number of oxidation of an element to represent the oxidation state of an element in a compound. The number of oxidation represents both the characteristic oxidation state of the element in the compound and is a convenient conception of chemistry commonly used. The convenience is that the number of oxidation can be either positive or negative, either “0” , But also for the score. Therefore, the use of oxidation number, without the loss of electrons have redox reaction (hereinafter referred to as oxygen reaction) teaching, help students remember and master, but also easy for teachers to teach. The concept of oxidation number has gone through a shallow, from low to high, by definition lax