At room temperature, Bromine evaporates readily to form a red to amber coloured gas. It is the third-lightest halogen, and is a fuming liquid with a deep red color.
From Wikipedia, the free encyclopedia Jump to navigation Jump to search chemical element with atomic number 35Chemical element with atomic number 35Bromine, 35BrBrominePronunciation/broʊmiːn, -mɪn, -maɪn/ (BROH-meen, -min, -myn)Appearancereddish-brownStandard atomic weight Ar, std(Br) conventional: 79.904Bromine in the periodic tableHydrogenHeliumLithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeonSodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgonPotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKryptonRubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenonCaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadonFranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganessonCl↑Br↓ I selenium ← bromine → kryptonAtomic number (Z)35Groupgroup 17 (halogens)Periodperiod 4 Blockp-block Element category reactive nonmetalElectron configuration 3d10 4s2 4p5Electrons per shell2, 8, 18, 7Physical propertiesPhase at STPliquidMelting point265.8 K (−7.2 ☌, 19 ☏) Boiling point332.0 K (58.8 ☌, 137.8 ☏) Density (near r.t.)Br2, liquid: 3.1028 g/cm3Triple point265.90 K, 5.8 kPa Critical point588 K, 10.34 MPa Heat of fusion(Br2) 10.571 kJ/mol Heat of vaporisation(Br2) 29.96 kJ/mol Molar heat capacity(Br2) 75.69 J/(mol