redox

• Oxidation


  Loss of electrons or an increase in oxidation number.
• Oxidation number


  A measure of the number of electrons that an atom uses to bond with atoms of another element
• Oxidising agent


  A reagent that oxidises (takes electrons from) another species.
• Redox reaction

  A reaction involving reduction and oxidation.
• Reducing agent

  A reagent that reduces (adds electrons to) another species.
• Reduction

  Gain of electrons or a decrease in oxidation number.
• Disproportionation

  A redox reaction in which the same element is both oxidised and reduced
• If an element is being oxidised, it acts as a reducing agent
• If an element is being reduced, it acts as an oxidising agent
• Compounds with Roman numeral shows the oxidation number of the element, without a sign. For example iron (II) represents Fe2+ with oxidation number +2
• The oxidising agent is the reactant that contains the element which decreases in oxidation state
• Oxidation can be defined as

  • loss of electrons
  • increase in oxidation state
  • gain of oxygen