Xenon (Xe) is a chemical element with atomic number 54. It's part of a group of elements called noble gases. Like other noble gases, xenon is unreactive. Xenon gas is often used in photographic flashes.

There are plenty of stable xenon isotopes, but ¹²⁹Xe and ¹³²Xe are the most abundant.

Xenon is one of the fifteen elements which can be spelled using chemical element symbols: Xe - No - N.