Krypton (from Greek: κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquified air, and is often used with other rare gases in fluorescent lamps. Krypton is inert for most practical purposes.Symbol: Kr
Atomic number: 36
Electron configuration: [Ar] 3d10 4s2 4p6
Electronegativity: 3
Atomic mass: 83.798 u
Discoverers: William Ramsay, Morris Travers