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Assigning Oxidation Numbers
Assigning Oxidation Numbers
8
Chemistry
11th Grade
10/07/2008

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Term
Free elements
Definition
Always 0
Term
Monatomic ions
Definition
Same as charge of ion
Term
Oxygen
Definition
Always -2 except in hydrogen peroxide and the peroxide ion
Term
Hydrogen
Definition
Always +1 except when bonded to metals in binary compounds then -1
Term
Halogens
Definition
Fl always -1
Cl, Br, I always -1 except with oxygen then +1
Term
Sum of all the oxidation numbers
Definition
Net charge of ion or molecule
Term
Metal oxidation numbers
Definition
Always positive transition have multiple states
Term
General rule for oxidation number of all elements
Definition
Oxidation number can never be greater than the group number
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