Xenon was discovered in England by the Scottish chemist William Ramsay and English chemist Morris Travers on July 12, 1898, shortly after their discovery of the elements 展开

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 stable. In addition, more than 40 unstable isotopes … 展开

Although xenon is rare and relatively expensive to extract from the Earth's atmosphere, it has a number of applications. 展开

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 … 展开

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 … 展开

After Neil Bartlett's discovery in 1962 that xenon can form chemical compounds, a large number of xenon compounds have been discovered and … 展开

Xenon gas can be safely kept in normal sealed glass or metal containers at standard temperature and pressure. However, it readily dissolves in most plastics and rubber, and will gradually escape from a container sealed with such materials. Xenon is non- 展开