Oxidation State Rules

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6 Terms

1
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Rule 1

Atoms of a pure element have an oxidation state of 0.

2
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Rule 2

Monatomic ions: oxidation state is the same as the charge

3
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Rule 3

H is +1 in a non metallic compound

4
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Rule 4

O is -2 in a covalent compound (H2O) EXCEPT in peroxides (H2O2, oxidation state of -1)

5
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Rule 5

Atom with the greater electronegativity gets the electrons in a
binary compound. Ex: in H2S, S is -2, but in SF6, S is +6.

6
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Rule 6

Sum of oxidation states is 0 for an uncharged molecule, and
equals the charge for an ion.