Why are halogens strong oxidising agents?

Explanation

Due to low bond dissociation enthalpy, high electronegativity and large negative electron gain enthalpy, halogens have a strong tendency to accept elections and thus get reduced.
`X+e^(-) to X^-`
As a result, halogens act as strong oxidising agents. Their oxidising power, however, decreases from `F_2` to `I_2` Thus, `F_2` is the strongest while `I_2` is the weakest oxidising agent.