Some chemical properties of xenon include dissolving slightly in water, reacting with fluorine and becoming toxic and explosive in compound form. Xenon is known as an "inert gas" or a "noble gas" because it typically does not form compounds with other elements.
Xenon was discovered in England in 1898 by Morris W. Travers and Sir William Ramsay. Its name comes from the Greek word for "stranger" (xenos). The atomic symbol for xenon is Xe, and the atomic number is 54. It is found in small amounts in the Earth's atmosphere. Xenon was originally thought to be unable to form compounds with other elements. However, the element can and does form compounds. Examples include xenon trioxide, xenon deuterate and sodium perxenate.