Oxidation Rules

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  • Redox
    • Pure Element
      • Oxidation number is 0
    • Ions
      • Halide ions (Cl, F, Br, I, ect) oxidation number is -1
      • Group 2 Metals ions have an oxidation number of +2
      • Group 1 Metals ions have an oxidation number of +1
    • Compunds
      • Fluorine always has an oxidation number of -1
      • Hydrogen has an oxidation number of +1
      • Oxygen has an oxidation number of -2
    • Common Exceptions
      • In a Metal Hydride, hydrogen has an oxidation number of -1
      • When Oxygen is connected to Fluorine, it has an oxidation number of +2
      • In a Peroxide, Oxygen has an oxidation number of -1
    • The oxidation number of a compound is the same as its charge

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