Coronal view from magnetic resonance imaging (MRI). The MRI study provides anatomical information about the osseous and soft tissue extent of a tumor. From Thrall and Ziessman, 2001.
The halogens or halogen elements (/ËhaelÉµdÊÉ¨n/) ËhÃ¦lÉµdÊÉ¨n are a group in the periodic table consisting of five chemically related: elements (Fluorine), f (Chlorine), cl (Bromine), br (Iodine), i and (Astatine). At the artificially created element (117) ununseptium may also be a. halogenn the modern IUPAC nomenclature, this group is known as group 17. The name 'halogen' means 'salt-producing'. When halogens react with metals they produce a wide range of salts, including calcium fluoride, sodium chloride (common salt), silver bromide and potassium iodide.
uk â /ËheÉª.lÉÊ/ us â /ËheÉª.loÊ/ plural haloes or halos. âº [ C ] a ring of light around the head of a holy person in a religious drawing or painting. âº [ C usually singular ] a bright circle of light around something, or something that looks like this: the halo around the moon. a halo of blonde curls.