Xenon is a "noble" or, more accurately,
"inert" gas present in the atmosphere to a small extent. Xenon is
present in the Martian atmosphere to the extent of about 0.08 ppm. Before 1962,
it was generally assumed that xenon and other noble gases were unable to form
compounds. Among the compounds of xenon now reported are xenon hydrate, sodium
perxenate, xenon deuterate, difluoride, tetrafluoride, hexafluoride,
and XePtF6 and XeRhF6. The highly explosive xenon trioxide, XeO3, is known.
Metallic xenon is produced by applying several hundred kilobars of pressure. Xenon in a vacuum tube produces a blue glow when excited by an electrical discharge and finds use in strobe lamps. It is an odourless, colourless, inert gas.
•Name: Xenon
•Symbol: Xe
•Atomic number: 54
•Atomic weight: 131.293 (6) [see note g
•Standard state: gas at 298 K
•CAS Registry ID: 7440-63-3
•Group in periodic table: 18
•Group name: Noble gas
•Period in periodic table: 5
•Block in periodic table: p-block
•Colour: colorless
•Classification: Non-metallic
Historical information
Xenon was discovered by Sir William Ramsay and Morris W. Travers at 1898 in England, in the residue left after evaporating liquid air components. Origin of name: from the Greek word "xenos" meaning "stranger". Krypton and neon had been discovered by the same methods by the same workers only weeks earlier. They had to work with huge volumes of air to produce just a little xenon since it turned out that xenon is only present to the extent of about 0.087 ppm in the atmosphere.
Physical properties
•Melting point: 161.4 [or -111.7 °C (-169.1 °F)] K
•Boiling point: 165.1 [or -108 °C (-162 °F)] K
•Density of solid: 3640 kg m-3
Orbital properties
•Ground state electron configuration: [Kr].4d10.5s2.5p6
•Shell structure: 2.8.18.18.8
•Term symbol: 1S0
Isolation
Xenon is present to a small extent in the atmosphere (less than 1 ppm by volume) and is obtained as a byproduct from the liquefaction and separation of air. This would not normally be carried out in the laboratory and xenon is available commercially in cylinders at high pressure.
Metallic xenon is produced by applying several hundred kilobars of pressure. Xenon in a vacuum tube produces a blue glow when excited by an electrical discharge and finds use in strobe lamps. It is an odourless, colourless, inert gas.
•Name: Xenon
•Symbol: Xe
•Atomic number: 54
•Atomic weight: 131.293 (6) [see note g
•Standard state: gas at 298 K
•CAS Registry ID: 7440-63-3
•Group in periodic table: 18
•Group name: Noble gas
•Period in periodic table: 5
•Block in periodic table: p-block
•Colour: colorless
•Classification: Non-metallic
Historical information
Xenon was discovered by Sir William Ramsay and Morris W. Travers at 1898 in England, in the residue left after evaporating liquid air components. Origin of name: from the Greek word "xenos" meaning "stranger". Krypton and neon had been discovered by the same methods by the same workers only weeks earlier. They had to work with huge volumes of air to produce just a little xenon since it turned out that xenon is only present to the extent of about 0.087 ppm in the atmosphere.
Physical properties
•Melting point: 161.4 [or -111.7 °C (-169.1 °F)] K
•Boiling point: 165.1 [or -108 °C (-162 °F)] K
•Density of solid: 3640 kg m-3
Orbital properties
•Ground state electron configuration: [Kr].4d10.5s2.5p6
•Shell structure: 2.8.18.18.8
•Term symbol: 1S0
Isolation
Xenon is present to a small extent in the atmosphere (less than 1 ppm by volume) and is obtained as a byproduct from the liquefaction and separation of air. This would not normally be carried out in the laboratory and xenon is available commercially in cylinders at high pressure.
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