HHomeBackground Color:He
LiBeRadon Main PageBlack White GrayBCNOFNe
NaMgRadon Pictures PageAlSiPSClAr
KCaRadon Isotope DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMcLvTsOg

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
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 Volume0.02281603288798
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
DOT Hazard Class
7
DOT Numbers2912
RTECS Number
RTECSVE3750000
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockp
Group18
Period6
SeriesNoble Gas
Electron Configuration[Xe]6s24f145d106p6
ColorColorless
Discovery
1900 in Germany
Gas phaseMonoatomic
CAS NumberCAS10043-92-2
CID Number
CID24857
RTECS Number
RTECSVE3750000

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 Radius150 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-Life3.82349537037 d
Lifetime5.516087962963 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
None
Isotopic Abundances


Notes on the properties of Radon:

Atomic Mass: 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.

The Elements book Mad Science book Periodic Table Poster  Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here!