Xenon was discovered in England by the Scottish chemist William Ramsay and English chemist Morris Travers on July 12, … See more

Xenon has atomic number 54; that is, its nucleus contains 54 protons. At standard temperature and pressure, pure xenon gas has a density of 5.894 kg/m , about 4.5 times the density of the Earth's atmosphere at sea level… See more

Xenon is a trace gas in Earth's atmosphere, occurring at a volume fraction of 87±1 nL/L (parts per billion), or approximately 1 part per 11.5 million. It is also found as a component of gases emitted from some mineral spri… See more

Naturally occurring xenon is composed of seven stable isotopes: Xe, Xe, and Xe. The isotopes Xe and Xe are predicted by theory to undergo double beta decay, but this has never been observed so they are considered … See more

After Neil Bartlett's discovery in 1962 that xenon can form chemical compounds, a large number of xenon compounds have been discovered and described. Almost all known xenon compounds contain the electroneg… See more

Although xenon is rare and relatively expensive to extract from the Earth's atmosphere, it has a number of applications.
Xenon is used in light-emitting devices called xeno… See more