LET'S DISCOVER THE REACTIVITY OF GROUP 17 ELEMENTS

1. In nature, all halogens exist as diatomic molecules. They are written as F₂, Cl₂, Br₂, I₂ and As₂.
2. Most of the halogens exist in the nature as halide salts.
3. Halide is the name given to the ion of halogens. Table below shows the corresponding halide of the halogen.

Halogen	Halide
Fluorine	Fluoride
Chlorine	CHloride
Bromine	Bromide
Iodine	Iodide

NOW, let's discover how group 17 elements react. DON'T forget to relate with the atomic mass and electron arrangement of each elements to compare the reactivity between group 17 elements... HAPPY WATCHING!!!!