Redox reactions

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Across
  1. 1. The oxidation number of an uncombined element
  2. 6. The loss of electrons in an element
  3. 8. A number system used to represent oxidation numbers
  4. 9. Oxidation number of manganese in Mn₂O₇
  5. 10. A decrease in the oxidation number of an element
Down
  1. 2. A reaction including oxidation and reduction reactions
  2. 3. An element with an oxidation number of 1+
  3. 4. An element with an oxidation number of (II) or (III)
  4. 5. The oxidation number of an ion is the _____ of the ion
  5. 6. An element with an oxidation number of 2-
  6. 7. ____ elements are located in the centre of the Periodic Table