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

Melting Point: 161.3 K →Boiling Point: 166.1 K →Specific Heat: 0.158 J/(g·K) →Thermal Conductivity: 0.0057 W/(m·K) →Heat of Vaporization: 12.65 kJ/mol →

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%