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Technical data for Radon

Click any property name to see plots of that property for all the elements.

Overview
NameRadon
SymbolRn
Atomic Number86
Atomic Weight222[note]
Density9.73 g/l[note]
Melting Point-71 °C
Boiling Point-61.7 °C

Thermal properties
PhaseGas
Melting Point-71 °C
Boiling Point-61.7 °C
Absolute Melting Point202 K
Absolute Boiling Point211.3 K
Critical Pressure6.28 MPa (61.98 Atm)
Critical Temperature377 K
Heat of Fusion3 kJ/mol
Heat of Vaporization17 kJ/mol
Heat of CombustionN/A
Specific Heat93.65 J/(kg K)[note]
Adiabatic Index5/3
Neel PointN/A
Thermal Conductivity0.00361 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density9.73 g/l[note]
Density (Liquid)N/A
Molar Volume0.02282
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk ModulusN/A
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive IndexN/A
Speed of SoundN/A
Thermal Conductivity0.00361 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence6
ElectronegativityN/A
ElectronAffinity0 kJ/mol
Ionization Energies
1037 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class7
DOT Numbers2912
EU NumberEU233-146-0
NFPA Fire RatingN/A
NFPA HazardsN/A
NFPA Health RatingN/A
NFPA Reactivity RatingN/A
RTECS NumberRTECSVE3750000
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockp
Group18
Period6
Electron Configuration[Xe]4f145d106s26p6
ColorColorless
Discovery
1900 in Germany
Gas phaseMonoatomic
CAS NumberCAS10043-92-2
CID NumberCID24857
Gmelin NumberGmelin16242
NSC NumberN/A
RTECS NumberRTECSVE3750000

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in UniverseN/A
% in SunN/A
% in MeteoritesN/A
% in Earth's CrustN/A
% in Oceans6×10-20%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius120 pm
Covalent Radius145 pm
Van der Waals RadiusN/A
Crystal StructureN/A
Lattice AnglesN/A
Lattice ConstantsN/A
Space Group NameN/A
Space Group NumberN/A

Nuclear Properties
Half-Life3.823495 d
Lifetime5.516088 d
Decay ModeAlphaEmission
Quantum Numbers1S0
Neutron Cross Section0.7
Neutron Mass AbsorptionN/A
Known Isotopes
195Rn, 196Rn, 197Rn, 198Rn, 199Rn, 200Rn, 201Rn, 202Rn, 203Rn, 204Rn, 205Rn, 206Rn, 207Rn, 208Rn, 209Rn, 210Rn, 211Rn, 212Rn, 213Rn, 214Rn, 215Rn, 216Rn, 217Rn, 218Rn, 219Rn, 220Rn, 221Rn, 222Rn, 223Rn, 224Rn, 225Rn, 226Rn, 227Rn, 228Rn
Stable Isotopes
Isotopic Abundances


Notes on the properties of Radon:

Atomic Weight: Atomic mass number given for longest lived isotope.

Density: Density at 0° Celsius.

Specific Heat: Value given for gas phase.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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