radon
Chemical element with symbol Rn and atomic number 86; rare gas
Also known as 86Rn · element 86
- Symbol
- Rn
- Atomic number
- 86
- Mass
- 222.0176 Da
1
Sources- 1.physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=&ascii=ascii2&isotype=allRetrieved 2026-09-19
- 222.0176 Da
- Melting point
- 202 K
- Boiling point
- 211.3 K
- Discovered by
- Discovered
- 1899
Overview
All data
127 statements · 28% with external sources · numbers in brackets are citations
- Formula
- Rn
1
- Rn
- Canonical SMILES
- [Rn]
1
- [Rn]
- Electron configuration
- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶
- [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p⁶
- Thermal conductivity
- 0.00364 watt per metre kelvin
- Standard molar entropy
- 176.23 joule per mole kelvin state of matter: gas
- Ionization energy
- 10.7485 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 18.99 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 10.7485 eV
- IPA transcription
- ˈreɪdɒn language: English
- Oxidation state
- 0
- 2
- 6
- Covalent radius
- 150 picometre
On other databases
68 identifiers linking radon across the web's reference databases
- Arabic Ontology lexical concept ID151078522
- Art & Architecture Thesaurus ID300380555
- Australian Educational Vocabulary IDscot/3565
- BabelNet ID00006918n
- BNCF Thesaurus ID18886
- CAB ID224863
- CAS Registry Number10043-92-2
- ChEBI ID33314
- ChemSpider ID23240
- De Agostini ID+ràdon+o+rado²
- Dewey Decimal Classification546.756
- DSSTOX compound identifierDTXCID504295
- DSSTox substance IDDTXSID7024295
- EC number233-146-0
- ECHA Substance Infocard ID100.030.120
- Encyclopædia Britannica Online IDscience/radon
- Encyclopædia Universalis IDradon
- Encyclopedia of China (Third Edition) ID (2026)AKtAE
- Encyclopedia of China (Third Edition) old ID (2021)151736
- Fandom article IDhome:Radon
- Freebase ID/m/025scmp
- Gmelin number16242
- GND ID4133224-6
- Great Norwegian Encyclopedia IDradon
- Great Russian Encyclopedia portal IDradon-db2f26
- Hrvatska enciklopedija IDradon
- HSDB ID6369
- ICSC ID1322
- InChIInChI=1S/Rn
- InChIKeySYUHGPGVQRZVTB-UHFFFAOYSA-N
- Interlingual Index IDi113993
- J9U entity ID987007560613605171
- JSTOR topic ID (archived)radon
- KBpedia IDRadon
- KEGG IDC16454
- Lex IDradon
- Library of Congress Authorities IDsh85110814
- MeSH descriptor IDD011886
- MeSH tree codeD01.268.271.800
- Microsoft Academic ID (discontinued)545943180
- Museum-digital tag ID27400
- Namuwiki ID라돈
- National Library of Poland MMS ID9810617849305606
- NDL Authority ID00569245
- NicoNicoPedia word article IDラドン
- NL CR AUT IDph124996
- OmegaWiki Defined Meaning3094
- OpenAlex IDC2910280731
- OSHA Occupational Chemical Database ID883
- PSH ID5821
- PubChem CID24857
- Quora topic IDRadon
- ScienceDirect topic IDchemistry/radon
- Store medisinske leksikon IDradon_-_helsevirkninger
- SureChEMBL ID53481
- SVKKL authority IDh0003764-radon
- Treccani IDradon
- UK Archival Thesaurus IDf2/mt225/4347/9025
- UK Parliament thesaurus ID12360
- UMLS CUIC0205919
- UniChem compound ID1101099
- UNIIQ74S4N8N1G
- USGS Thesaurus ID1552
- Vikidia article IDfr:Radon
- WikiKids IDRadon_(element)
- WordNet 3.1 Synset ID14676283-n
- Yale LUX IDconcept/87671251-098a-419e-bee1-ead497ec7507
- YSO ID6953