What are halogens?
Halogens are any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table.
Where are they found?
None of the halogens can be found in nature in their elemental form. They are manly found as salts of the halide ions.
How are Halogens used?
Halogen compounds can be very toxic but some can be very useful for the human body's functioning and are used in everyday products.