1 (1 point) Match the scientific term to the correct definition or equation. a species that reduces another species; it is itself oxidized the half-reaction in which there is a loss of electrons by a species (or an increase of oxidation number of an atom) the half-reaction in which there is a gain of electrons by a species (or a decrease in the oxidation number of an atom) a reaction in which electrons are transferred between species or in which atoms change oxidation number 1. oxidation-reduction reaction 2. oxidation numbers 3. half reaction 4. oxidizing agent 5