Question

Method to find the oxidation numbers​

Answer 1

• The oxidation number of a free element is always 0.
• The oxidation number of a monatomic ion equals the charge of the ion.
• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.
• The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.

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Answer 2

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☑The oxidation number of a free element is always 0.

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

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

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