Krypton 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 and is often used with other rare gases in fluorescent lamps. With rare exceptions, krypton is chemically inert.

AAtomic Weight:  83.798
Density:         3.75 g/l
Melting Point:   -157.36 °C
Boiling Point:   -153.22 °C