how does the oxidizing strength of the halogen elements vary down the group?

Answer 1

The halogens show a number of trends when moving down the group - for instance, decreasing electronegativity and reactivity, increasing melting and boiling point.

Answer 2

It decreases as you go down the group in the Halogen Family. F is most reactive.

Answer 3

The strongest oxidizer is at the top and decreases down the group. This means Flourine is strongest, then Chlorine, then Bromine, then Iodine, then Astatine.