Halogens

Halogens

1. Name,Symbol

   • Fluorine F
     • Pale yellow poisonous gas. F2
   • Chlorine Cl
     • Green poisonous gas. Cl2
   • Bromine Br
     • Dark orange-red poisonous liquid that easily vaporises. Br2
   • Iodine I
     • A dark grey solid which on heating becomes a purple gas. I 2

2. When halogen elements form compounds fluoride, bromine becomes bromide, and the ion always has a charge of 1-.

3. Fluorine is the most reactive Group 7 elements, then chlorine, bromine, and finally iodine which is least reactive.