• A loss of negatively-charged electrons corresponds to an increase in oxidation number, while a gain of electrons correspond to a decrease in oxidation numbers.
  • The element or ion that is oxidized undergoes an increased oxidation number; the element that is reduced undergoes a decreased oxidation number.
  • Table below summarizes the processes of oxidation and reduction.
  • List the ways that the conversion of aluminum in the reaction above fits the definitions in the table.
  • List ways the reduction of ferric oxide fits the definition of oxidation.
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