fluorine

fluorine
Name	Fluorine
Appearance	Pale yellow gas
Phase	Gas at STP
Group	17
Block	p-block
Electron configuration	[He] 2s2 2p5
Atomic mass	19.00

fluorine Fluorine is a highly reactive, pale yellow diatomic gas at standard conditions, belonging to the halogen group. It occupies the second period and ninth atomic number position in the periodic table and exhibits the highest electronegativity among the elements. Discovered and isolated in the 19th century, it has played central roles in industrial chemistry, materials science, and public health controversies.

Characteristics

Fluorine's physical and chemical characteristics are shaped by its electronic configuration, ionization energy, and electronegativity, making it the most electronegative element known; these properties underpin reactions studied at institutions such as Royal Society of London, Max Planck Institute for Chemical Physics of Solids, Massachusetts Institute of Technology, California Institute of Technology, and University of Cambridge. Its diatomic molecular form manifests unusual bond properties examined by researchers at Los Alamos National Laboratory, Lawrence Berkeley National Laboratory, DuPont, BASF, and 3M Company. The element's reactivity requires specialized containment materials and techniques developed in laboratories like Institut National de la Recherche Scientifique, ETH Zurich, Imperial College London, Tokyo Institute of Technology, and Severo Ochoa Molecular Biology Center. Fluorine forms strong bonds with hydrogen, carbon, nitrogen, and metals, influencing projects at Bell Labs, Brookhaven National Laboratory, Rutherford Appleton Laboratory, Argonne National Laboratory, and Oak Ridge National Laboratory.

Occurrence and production

Naturally, fluorine is not found free; it occurs mainly as the mineral fluorite and in deposits mined by companies and entities such as Rio Tinto Group, BHP, Vale S.A., Anglo American plc, and national mining agencies of China, Mexico, Russia, South Africa, and India. Extraction and production processes for fluorine-containing raw materials involve electrochemical and chemical industries operated by corporations including Solvay S.A., Albemarle Corporation, Lanxess, Mitsubishi Chemical, and Arkema. Industrial isolation of elemental fluorine historically built on electrolysis methods developed by researchers linked to University of Oxford, École Polytechnique, Kaiser Wilhelm Society, General Electric, and Siemens AG. Major production sites and supply chains intersect with global trading hubs like Rotterdam, Singapore, Shanghai, Houston, and Dubai.

Isotopes

Fluorine has a single stable isotope widely used in science and technology; studies and measurements involving isotopic composition are reported by organizations such as International Atomic Energy Agency, National Institute of Standards and Technology, European Space Agency, NASA, and CERN. Research into short-lived radioisotopes and their applications draws on facilities including TRIUMF, GANIL, RIKEN, GSI Helmholtz Centre for Heavy Ion Research, and Paul Scherrer Institute. Isotopic methods contribute to investigations in paleoclimatology, planetary science, and cosmochemistry pursued by teams at Smithsonian Institution, Natural History Museum, London, Field Museum of Natural History, American Museum of Natural History, and Mines ParisTech.

Compounds and chemistry

Fluorine forms an extensive array of compounds, from inorganic salts like calcium fluoride to complex organic fluorides exploited by companies and research centers such as Dow Chemical Company, Pfizer, GlaxoSmithKline, Roche, and Johnson & Johnson. Fluorination techniques and catalysts developed in academic groups at Harvard University, Stanford University, Yale University, University of California, Berkeley, and Princeton University enable synthesis of pharmaceuticals, agrochemicals, and polymers. Metal fluorides, interhalogen species, and noble gas fluorides have been subjects of investigations at Royal Institution, Weizmann Institute of Science, University of Chicago, Columbia University, and University of Tokyo. The unique strength of the carbon–fluorine bond informs materials such as polytetrafluoroethylene, with landmark industrial work by 3M Company, DuPont, Asahi Glass Co., Solvay S.A., and Mitsui Chemicals.

Applications

Applications span refrigeration, propellants, electronics, medicine, and metallurgy; multinational companies and agencies using fluorine chemistry include Siemens AG, General Electric, Apple Inc., Samsung Electronics, Boeing, and Airbus. Radiolabeled compounds derived from fluorine isotopes are crucial in positron emission tomography carried out at hospitals and research centers such as Mayo Clinic, Johns Hopkins Hospital, Massachusetts General Hospital, Cleveland Clinic, and Karolinska Institutet. Fluorinated polymers and coatings feature in products from Toyota Motor Corporation, Ford Motor Company, BMW, Nestlé, and Unilever. Fluorination is central to semiconductor fabrication in fabs operated by TSMC, Intel Corporation, Samsung Electronics, GlobalFoundries, and Micron Technology.

Biological effects and toxicology

Fluorine-containing compounds influence human health and ecology, prompting regulatory and public-health engagement by organizations such as World Health Organization, Centers for Disease Control and Prevention, Environmental Protection Agency, European Chemicals Agency, and Food and Drug Administration. Clinical applications and toxicology studies are undertaken at universities and hospitals including Karolinska Institutet, Johns Hopkins University School of Medicine, Mayo Clinic, Harvard Medical School, and University College London. Environmental monitoring and remediation involving fluoride species engage agencies and NGOs like United Nations Environment Programme, Greenpeace, World Wildlife Fund, International Red Cross, and Doctors Without Borders. Controversies over fluoridation, exposure limits, and ecological impact have featured in legal and policy arenas involving bodies such as United States Congress, European Parliament, Supreme Court of the United States, House of Commons of the United Kingdom, and national ministries of health and environment across Canada, Australia, New Zealand, Brazil, and South Africa.

Category:Chemical elements