Oxidation States - Oxidation States

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Oxidation States Oxidation numbers  provides a means of keeping track of electrons in redox reactions. For  some elements, the oxidation number is just another way of stating what its most stable  cation or anion will be. In other cases, it is not so obvious, so we have rules. Rules for assigning oxidation numbers 1. The oxidation number for elements is always zero.  For  example,  Na (s) O 2(g) C (s)  all have zero oxidation numbers. 2. The oxidation number of monoatomic ions is the same as their charge.  You  already know this one. This means that for  Na + , the oxidation number is +1 and for  Cl - the oxidation number is -1. 3. Oxygen is assigned a -2 oxidation number in covalent compounds.  This refers to  compounds such as  CO, CO 2 SO 2 , and  SO 3 . There is an exception to this rule, and it is in  peroxides, such as H 2 O 2 . Here, each 
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Oxidation States - Oxidation States

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