Histoire & Art A transdisciplinary graph

Astronomy Chemical element

Radon

Radon (Rn) is a chemical element belonging to the category Noble gas, with atomic number 86 and atomic mass 222.0000 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

Stays within its layer Astronomy

Neighbourhood in the graph

Above, what contains it; below, what it contains; on the right, what links it to another layer.

Astronomy · Chemical element

Radon

EL2E

Identity

  • Name: Radon
  • Symbol: Rn
  • Atomic number: 86
  • Atomic mass: 222.0000 u

Position in the periodic table

  • Group: 18
  • Period: 6
  • Category: Noble gas

Physico-chemical properties

  • Standard state: Gas
  • Melting point: -71°C
  • Density: About 9.73 g/L (gas at STP, denser than air)
  • Electron configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

Scientific description

Radon is a chemical element with symbol Rn and atomic number 86. It belongs to the category of Noble gas and occupies group 18 and period 6. Its standard atomic mass is 222.0000 u.