Term
Rules for Assigning Oxidation States
Rule #1 |
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Definition
The oxidation state of an atom in its elemental state is 0.
(BrINClHOF: Br2, I2, N2, Cl2, H2 O2 F2), Cu, Al, Fe) |
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Term
Rules for Assigning Oxidation States
Rule #2 |
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Definition
| The oxidation state of a monoatomic ion is identical to the ion charge. |
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Term
Rules for Assigning Oxidation States
Rule #3 |
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Definition
| The sum of all oxidation states of all atoms within a compound is 0. |
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Term
Rules for Assigning Oxidation States
Rule #4 |
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Definition
| The sum of all oxidation states of all atoms within a polyatomic ion is identical to the ion charge. |
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Term
Rules for Assigning Oxidation States
Rule #5 |
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Definition
| The oxidation state of all Group IA atoms in a compound is +1. |
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Term
Rules for Assigning Oxidation States
Rule #6 |
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Definition
| The oxidation state of all Group IIA atoms in a compound is +2. |
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Term
Rules for Assigning Oxidation States
Rule #7 |
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Definition
The oxidation state of H in combination with
nonmetals is +1. |
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Term
Rules for Assigning Oxidation States
Rule #8 |
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Definition
The oxidation state of H in combination
with metals is -1. |
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Term
Rules for Assigning Oxidation States
Rule #9 |
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Definition
| The oxidation state of F in all compounds is -1. |
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Term
Rules for Assigning Oxidation States
Rule #10 |
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Definition
The oxidation state of O in most compounds is -2
(unless the compound also contains F, in which case the oxidtation state of O is -1). |
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Term
Rules for Assigning Oxidation States
Rule #11 |
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Definition
| The oxidation state of O in peroxides (i.e. O2-2) is -1. |
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Term
Rules for Assigning Oxidation States
Rule #12 |
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Definition
| The oxidation state of Group VIIA atoms is -1 when in combination with metals, nonmetals (other than O) and other halogens lower in Group VIIA. |
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