Halogens
By: Madi Reynolds
What are they?
Halogens are five non-metallic elements, Fluorine, Chlorine, Bromine, Iodine, and Astatine, found in group 17 of the periodic table. All halogens have 7 electrons electrons in their outer shells, giving them an oxidation number of -1. At room temperature, halogens exist in all three states of matter.
What are they used for?
Halogens are found in:
- pool water
- toothpaste
- disinfectant
- pesticides
- dyes
- soaps
- picture film
- medicine