Chemistry / Unit 12 Chem 2349 short lesson, about 20 seconds
Halogen Oxidizing Strength Decreases Down the Group
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The idea
Halogen oxidizing strength decreases down the group as electronegativity falls, so fluorine is the strongest halogen oxidizer and iodine the weakest.
In practice
Chlorine oxidizes bromide ion to elemental bromine, but iodine cannot oxidize any of the halide ions above it.
Where people slip
A weaker halogen oxidizer is not a nonoxidizer — iodine still oxidizes many metals, less readily than lighter neighbors.
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