eodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadonFranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganessonNe↑Ar↓Krක්ලෝරීන් ← argon → පොටෑසියම්Groupgroup 18 (noble gases)Periodperiod 3Block  p-blockElectron configuration[Ne] 3s2 3p6Electrons per shell2, 8, 8Physical propertiesPhase at STPgasMelting point83.81 K ​(−189.34 °C, ​−308.81 °F) Boiling point87.302 K ​(−185.848 °C, ​−302.526 °F) Density (at STP)1.784 g/Lwhen liquid (at b.p.)1.3954 g/cm3 Triple point83.805