CC13c Halogen reactivity 0.0 / 5 ? ChemistryHalogen reactivityGCSEEdexcel Created by: swagskoolCreated on: 26-02-23 18:00 displacement reaction When a more reactive element displaces a less reactive element from one of its compounds. 1 of 6 oxidation A reaction in which oxygen is added to a substance loss of electrons by an atom or negative ion. 2 of 6 oxidised When a substance has gained oxygen (or lost electrons) in a reaction. 3 of 6 redox A reaction in which both oxidation and reduction occur. 4 of 6 reduced When a substance has lost oxygen (or gained electrons) in a reaction. 5 of 6 reduction A reaction in which oxygen is removed from a substance; gain of electrons by an atom or positive ion. 6 of 6
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