Finding the Oxidation Number of an Element in a Compound

Since the sum of the oxidation numbers for all of the elements in a compound is zero, we can find the oxidation number of an element in a compound. But you should remember the oxidation number of some common ions like Na K , Ca, Ba , Ag, AP are constant. Additionally, an in general, oxygen 

also known as saltpeter, is used in the manufacture of fireworks and matches production of fertilizers, and as a food preservative for meat products. 

We know that the oxidation numbers of sodium and oxygen are generally +1 and —2, respectively, in their compounds. 

Since the net charge of a compound is zero, the oxidation number of Fe in Fe304 is calculated below. 

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Problem-Solving Strategy Finding the Oxidation Number of an Element in a Compound... 

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