Ch_3-1_oxidation_state_rules

Ch_3-1_oxidation_state_rules - 6. Hydrogen in compounds is...

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O X I D A T I O N N U M B E R O R O X I D A T I O N S T A T E 1. Free elements are assigned an oxidation state of 0. 2. The sum of the oxidation states of all the atoms in a species must be equal to the net charge on the species. 3. The alkali metals (Li, Na, K, Rb, and Cs) in compounds are always assigned an oxidation state of +1. 4. Fluorine in compounds is always assigned an oxidation state of -1. 5. The alkaline earth metals (Be, Mg, Ca, Sr, Ba, and Ra) and also Zn and Cd in compounds are always assigned an oxidation state of +2.
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Unformatted text preview: 6. Hydrogen in compounds is assigned an oxidation state of +1. 7. Oxygen in compounds is assigned an oxidation state of -2. NOTE, RULES ARE APPLIED IN ORDER, that is, the rules with smaller numbers take precedent over those with larger numbers when there is a conflict. For example, Na 2 O (Na +1, O -2) and NaO (Na +1, O -1). Aside, using this method you do not need to learn a set of rules and then another set for the exceptions to those rules....
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