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Please define oxidation
Oxidation is the loss of electrons during a reaction
by a molecule, atom or ion.
An example of a reaction is that between hydrogen and fluorine gas to form hydrofluoric acid:
H2 + F2 → 2 HF
In this reaction, hydrogen is being oxidized and fluorine is being reduced. The reaction may be better understood if it is written in terms of two half-reactions.
H2 → 2 H+ + 2 e-
F2 + 2 e- → 2 F-