Halogen oxidizing power / reactivity (Oxidizing power of halogens decreases down the group: F₂ > Cl₂ > Br₂ > I₂.)

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Oxidizing power of halogens decreases down the group: F₂ > Cl₂ > Br₂ > I₂.

What each symbol means

SymbolWhat it stands for
Standard reduction potential trend

When to use this

F₂ has very high electron affinity and low bond dissociation energy issues balanced — strongest oxidizer; I₂ weakest among these.