SUBSCRIBESUBSCRIBESUBSCRIBEHomeHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyGames & QuizzesVideosOn This DayOne Good FactDictionaryNew ArticlesHistory & SocietyLifestyles & Social IssuesPhilosophy & ReligionPolitics, Law & GovernmentWorld HistoryScience & TechHealth & MedicineScienceTechnologyBiographiesBrowse BiographiesAnimals & NatureBirds, Reptiles & Other VertebratesEnvironmentFossils & Geologic TimeInsects & Other InvertebratesMammalsPlantsGeography & TravelGeography & TravelArts & CultureEntertainment & Pop CultureLiteratureSports & RecreationVisual ArtsImage GalleriesPodcastsSummariesTop QuestionsLists and StoriesBritannica KidsAsk the ChatbotGames & QuizzesHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyVideoshalogenIntroduction & Top QuestionsOxidationElectronic structureRelative reactivityReferences & Edit HistoryQuick Facts & Related TopicsImages & Videoshalogen summaryFacts You Should Know: The Periodic Table QuizPeriodic Table of the ElementsWhat are halogen elements?What are the major properties of the halogen elements?How rare is astatine?What is the longest-lived isotope of astatine?ScienceChemistryFacebookXhttps://www.britannica.com/science/halogenChemistry LibreTexts - The HalogensFrontiers - Frontiers in Chemistry - The study of halogen effect on the reactivity of the serine-targeting covalent warheadsNational Center for Biotechnology Information - PubMed Central - Halogen gas exposure: Toxic effects on the parturientOpenStax - Chemistry 2e - Occurrence, Preparation, and Properties of Halogenshalogen - Student Encyclopedia (Ages 11 and up)Viktor Gutmann
Emeritus Professor of Inorganic Chemistry, Technical University of Vienna. Author of Halogen Chemistry and others.AllBritannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....Historyperiodic tableelementsperiodic tablefluorinechlorinebromineiodineastatinetennessineradioactivehalf-livessodiumsaltssaltvalence electronselectronatomcompoundChlorinesaltchemical compoundsFluorinetooth decayIodinesodiumsaltssaltelementsconstituteperiodic tablefluorinechlorinebromineiodineastatinetennessinesodiumsaltssalthaliteEarthigneous rocksisotopescompoundshalogen lampwater-purificationtooth decayantisepticpesticidesethylene dibromidegasolineOxidationionic bond: sodium chloride, or table saltoxidizing agentsoxidation numberoxygenelectronsatomcombinehalidesfluorideschloridesbromidesiodidessaltshydrogen halidesatmospheric pressureacidssaltastatineiodinebrominechlorinefluorineomittedBritannica Quiz
Facts You Should Know: The Periodic Table QuizElectronic structurechlorine atomperiodic tablegroupvalence electronselectron shellelectronsorbitalsdesignatedatomnoble gasJean-Baptiste-André Dumasorganohalogen compoundiodinefluorinechlorinebromineSee all related contentSUBSCRIBE
At room temperature and atmospheric pressure the halogen elements in their free states exist as diatomic moleculesbondsigma bondsingle bondascribed
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