Krypton

Noble gas

Symbol: Kr

Atomic Number: 36

Standard State: Gas

Atomic Mass: 83.8

Electron Configuration: [Ar]4s2 3d10 4p6

Electronegativity: 3

Atomic Radius: 202

Ionization Energy: 14

Melting Point: 115.79

Boiling Point: 119.93

Density: 0.003733

Year Discovered: 1898