Radon

Noble gas

Symbol: Rn

Atomic Number: 86

Standard State: Gas

Atomic Mass: 222.0176

Electron Configuration: [Xe]6s2 4f14 5d10 6p6

Electronegativity:

Atomic Radius: 220

Ionization Energy: 10.745

Melting Point: 202

Boiling Point: 211.45

Density: 0.00973

Year Discovered: 1900