Electronic data		Thermal data		Steric data
Shells: 2,8,18,18,8 Orbitals: [Kr] 4d10 5s2 5p6 Electronegativity: 2.2, -- 1. Ionization potential: 12.1299 eV 2. Ionization potential: 21.21 eV 3. Ionization potential: 32.10 eV Oxidation states: 2,4,6 Electrical conductivity: --		Melting point: -111.9 °C Boiling point: -107.1 °C Specific heat: 0.158 J/gK Heat of fusion: 2.297 kJ/mol Heat of vaporization: 12.636 kJ/mol Thermal conductivity: 0.0000569 W/cmK		Atomic radius: 1.24 Å Ionic radius: -- Å () Covalent radius: 1.31 Å Atomic volume: 37.3 cm³/mol Density (293 K): 0.00588 g/cm³ Crystal structure: Cubic: Face centered

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
122Xe	0	122	0	20.1h	EC	View
123Xe	0	123	3/2	2.00h	EC,+	View
124Xe	0.096	123.906	0	--	stable	--
125Xe	0	125	1/2	17.1h	EC	View
126Xe	0.09	125.904	0	--	stable	--
127Xe	0	127	1/2	36.41d	EC	View
128Xe	1.92	127.904	0	--	stable	--
129Xe	26.44	128.905	1/2	--	stable	--
129Xem	0	129	11/2	8.89d	IT	View
130Xe	4.08	129.904	0	--	stable	--
131Xe	21.18	130.905	3/2	--	stable	--
131Xem	0	131	11/2	11.9d	IT	View
132Xe	26.89	131.904	0	--	stable	--
133Xe	0	133	3/2	5.243d	-	View
133Xem	0	133	11/2	2.19d	IT	View
134Xe	10.44	133.905	0	--	stable	--
135Xe	0	135	3/2	9.10h	-	View
135Xem	0	135	11/2	15.36m	IT	View
136Xe	8.87	135.907	0	--	stable	--
137Xe	0	137	7/2	3.82m	-	View
138Xe	0	138	0	14.13m	-	View

Legend

Name origin:	Greek: xenos (strange).
Description:	Heavy, colorless, odorless, noble gas.
Discovered by:	Sir William Ramsay; M. W. Travers
Year:	1898
Place:	England
Sources:	Obtain from the small quantities in liquid air.
Use(s):	Used for filling flash lamps and other powerful lamps. Electrical excitation of xenon produces a burst of brilliant white light. Also used in bubble chambers and modern nuclear power reactors.