Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, odorless, tasteless noble GAS found in the Earth's atmosphere in trace amounts. Xenon is a member of the zero-valence elements that are called noble gases. It is a GAS at standard temperature and pressure and is the heaviest known stable element. Xenon is often used in lighting and photography, as well as in medical and industrial applications. The crossword solutions for Xenon are GAS (3 letters), RAREGAS (7 letters), and NOBLEGAS (8 letters). GAS is an abbreviation for the general term 'GAS, ' which is a state of matter consisting of particles that are neither solid nor liquid. RAREGAS is a term used to describe a GAS that is not commonly found in the atmosphere, such as Xenon. NOBLEGAS is a term used to describe a group of elements that are chemically inert and do not form compounds with other elements, such as Xenon.