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2 August, 07:47

How to determine oxidation numbers

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  1. 2 August, 07:58
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    1. The oxidation number of a free element is always 0.

    2. The oxidation number of a monatomic ion equals the charge of the ion.

    3. The oxidation number of H is + 1, but it is - 1 in when combined with less electronegative elements.

    4. The oxidation number of O in compounds is usually - 2, but it is - 1 in peroxides.
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