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What is the oxidation number of Chlorine in NaClO4?
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What is the oxidation number of Chlorine in NaClO4?

User Zpasternack
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The oxidation number of chlorine can be determined by identifying first the oxidation numbers of oxygen and Na. Oxygen has a charge of -2 and has a total of -8. Na has +1. To make the total zero, Cl has to have a charge of +7. 
User Stanm
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