This is done by removing electrons.
The lost electron cannot exist on its own and must be code réduction colichef gained by a second substance.
Atoms can be oxidized by nonmetals.The electrons, being negative, reduce the overall oxidation number of the atom receiving the electrons.Oxidation and Redox Potentials edit For a half-reaction with a given oxidation potential, its reduction potential will be opposite in sign.For example when iron corrodes to form iron oxide.When a material comes into contact with a material with a lower electron affinity, it will remove electrons from the other material.Reduction is gain of electrons and thus gaining of negative charge.During the redox reaction there is a transfer of electrons from the substance being oxidized to the substance being reduced.This potential, measured in volts, is proportional to the free energy change.The reducing agent is an element or compound that can lose an electron (undergo oxidation).Each vessel in which half reaction takes place is called a half cell.
This is an example of a reduction reaction.
The RED, of course, comes from REDuction and OX from OXidation.
However, it is pronounced re-dox and not red-ox.Write half reactions for the oxidation and reduction.The voltage developed between any given half reaction, is called standard electrode potential ( E 0 ) of a half reaction.Oxygen usually has an oxidation number of -2, unless paired with fluorine (where it will be positive).The rest of the halogens (Cl, Br, I) usually have oxidation numbers of -1, except in their compounds with fluorine and oxygen, where they will be positive.The salt bridge does NOT transfer electrons.If it is decreased, then the element is reduced.It is reduced in the process.Reduction, reduction means what it says: the oxidation number is reduced in reduction.Therefore oxidation and reduction cannot occur alone.Many metal ores contain oxides of the metal.The oxidizing agent is an element or compound that can gain an electron (undergo reduction).Loses one or more electrons, gains an oxygen atom or Electronegative atoms.

The flow of electrons through the wire is caused by differences in electric potential between the electrodes.