A :B :C :D :E :F :G :H :I :J :K :L :M :N :O :P :Q :R :S :T :U :V :W :X :Y :Z :


Halogens

A family group of elements, including bromine, chlorine, fluorine, astatine, and iodine, which are extremely active chemically. These elements exist in the free state normally as diatomic molecules, but more commonly are found as the ionic component in compounds with various other elements.