BRAINCAKEOxidation Number
The oxidation number of an atom is the number of electrons it gains or loses in forming a compound.
• the oxidation number of uncombined elements is zero and for an ion is the charge on the ion
• the sum of oxidation numbers of all elements in a neutral compound is zero.
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More in Oxidation and Reduction
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- Example Question 1
- Example Question 2
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- Exam-style Question 1
All 14 lessons in Oxidation and Reduction · All Edexcel AS-level Chemistry topics