Essential Chemistry for IGCSE - The Periodic Table (Section 3 - No. 5)

Which of the following correctly describes the reactivity trend for halogens?

Fluorine is most reactive; reactivity decreases down the group.

Fluorine is least reactive; reactivity increases down the group.

Iodine is most reactive; reactivity decreases down the group.

Iodine is least reactive; reactivity increases down the group.

Fluorine is the most reactive, and the reactivity decreases as you go down.