Radon (Rn) — Element 86

86 Rn 222

Radon

Element 86 · 222 u · p-block

noble gas

A radioactive noble gas produced by radium decay. Second leading cause of lung cancer. Accumulates in basements.

Phase (STP)

Gas

Melting Point

-71 °C

Boiling Point

-61.7 °C

Density

0.00973 g/cm³

Electronegativity

2.2

Atomic Radius

—

Ionization Energy

1037 kJ/mol

Electron Affinity

0 kJ/mol

Discovered

1900 · Friedrich Ernst Dorn

Electron Configuration

[Xe] 4f14 5d10 6s2 6p6