The Washington tree, located in the Giant Forest Grove in Sequoia National Park provides a good example of the aforementioned phenomena. This tree was the second largest tree in the world (only the General Sherman tree was larger) until just a few years ago.
A halogen is a representative element from group VII in the periodic table. More specifically, Fluorine, Chlorine, Bromine, Iodine, and Astatine. Astatine is a very unstable radionuclide so is not normally dealt with. A halide is a chemical compound of halogens bonded to more electro positive elements.
A halogenated compound is a combination of one or more chemical elements that includes a halogen; halogens are a group of elements that include fluorine, astatine, chlorine, bromine and iodine. Halogens comprise the seventh column of the periodic table of the elements.