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Paper 4Theory (Extended)1 marks
Oxidation numbers are used to identify redox reactions.
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Oxidation Number Rules
1. Uncombined elements have an oxidation number of 0. 2. The oxidation number of a monatomic ion equals its charge. 3. The total oxidation numbers in a compound sum to 0. 4. The total oxidation numbers in an ion equal its charge.
- a[1]
State the oxidation number of an uncombined element.
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