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Oxidation Number of Potassium in K2O, K2O2, and KO2 Respectively

Answer: 

  • The oxidation state of an atom refers to the number of electrons lost or gained during the reaction. 
  • The oxidation number of Potassium in K2O, K2O2, and KO2 are +1, +1, and +1. 
  • This means that potassium always loses 1 electron whenever reacted.