54
131.29
Xe
Xenon
Identification
CAS Number: 7440-63-3
Discovery Year: 1898
Discoverer: Sir William Ramsay; M. W. Travers
Discovery Location: England
Properties
Atomic Mass: 131.293 →Density: 0.005365999999999999 g/cm³ →
Crust Abundance: 0.000029999999999999997 mg/kg
Crystal Structure: FCC
Atomic Dimensions
Atomic Radius (Rahm): 231.99999999999997 pm
Covalent Radius: 140 pm →Van der Waals Radius: 216 pm
Atomic Volume: 42.9 cm³/mol
Lattice Constant: 6.2 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d10 5s2 5p6
Block: p
Period: 5 →Group: 18 →Electronegativity: 2.6 →Electron Affinity: -0.055999999999999994 eV →Oxidation States: 0
Abundance & Geochemistry
Crust Abundance: 0.000029999999999999997 mg/kg
Sea Abundance: 0.00005 mg/L
Geochemical Class: volatile
Goldschmidt Class: atmophile
About
Colourless, odourless gas belonging to group 18 on the periodic table (the noble gases.) Nine natural isotopes and seven radioactive isotopes are known. Xenon was part of the first noble-gas compound synthesized. Several others involving Xenon have been found since then. Xenon was discovered by Ramsey and Travers in 1898.
Isotopes
Xe-132 132 26.91%
Xe-129 129 26.40%
Xe-131 131 21.23%
Xe-134 134 10.44%
Xe-136 136 8.86%
Xe-130 130 4.07%
Xe-128 128 1.91%
Xe-124 124 0.0950%
Xe-126 126 0.0890%
