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2. For a simple ion, the oxidation state is

  • the same as the charge on the ion
  • 0
  • +1
  • the group number

3. fluorine is always

  • 0
  • +2
  • -1
  • +1

4. The oxidation state of an element, whether uncombined or existing as a molecule is

  • the group number
  • 0
  • -1
  • +2

5. Combined hydrogen is usually

  • 0
  • +2
  • +1
  • -1
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