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Xenon

Non-Metalgaseous
Symbol: Xe
Atomic number: 54
Atomic mass: 131.29
Group: Noble Gas
CAS-number: 7440-63-3

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Physical data
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Physical data

Electronic dataThermal dataSteric 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
cubic face centered

Isotopes

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

Other info

Name origin:Greek: xenos (strange).
Description:Heavy, colorless, odorless, noble gas.
Discovered by:Sir William Ramsay; M. W. Travers
Year:1898
Place:England
Sources:Obtained 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.