Xenon (Xe): Atomic number: 54, Atomic mass: 131.29 g.mol -1, Electronegativity: unknown, Density: 5.9*10-3g.cm-3 at 20°C, Melting point: - 112 °C, Boiling point: - 107 °C, Vanderwaals radius: 0.217 nm, Isotopes: 21, Electronic shell: [ Kr ] 4d10 5s25p6, Energy of first ionisation: 1170 kJ.mol -1, Discovered by: Sir Ramsay 1898. Xenon is a rare, odorless, colourless, tasteless, chamically unreactive gas. It was regarded as completely inert until, in 1962, Neil Barlett reported synthesis of xenon haxafluoroplatinate. In a gas filled tube xenon emits blue light when excited by electrical discharge. Applications: Xenon has relatively little commercial use. It is used in photographic flash lamps, stroboscopic lamps, high-intensitive arc-lamps for motion picture projection and high-pressure arc lamps to product ultraviolet light (solar simulators). Other uses are as general anaesthetic, xenon 'blue' headlights and fog lights are used on some vehicles and are said to be less tiring on the eyes. They illuminate road signs and markings better than conventional lights. Xenon in the environment: Xenon si a trace gas in the Earth's atmosphere, occurring in 1 part in 20 million. The only commercial source of xenon is from industrial liquid-air plants. World production is less than 1 tonne per year, although reserved of xenon gas in the atmosphere amount to 2 billion tonnes.

 

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Xenon (Xe): Atomic number: 54, Atomic mass: 131.29 g.mol -1, Electronegativity: unknown, Density: 5.9*10-3g.cm-3 at 20°C, Melting point: - 112 °C, Boiling point: - 107 °C, Vanderwaals radius: 0.217 nm, . . . View Full Definition

Xenon: Element 54, a colorless, inert gas used to fill cathode ray tubes.