# radium (Q1128)

| Property ID | Property | Value | Value entity | Amount | Unit | Date / from | Until | Rank | Sources |
| --- | --- | --- | --- | ---: | --- | --- | --- | --- | --- |
| P246 | Symbol | Ra |  |  |  |  |  | normal | Atomic weights of the elements 2009 (IUPAC Technical Report) |
| P61 | Discovered by | Marie Curie | Q7186 |  |  |  |  | normal |  |
| P61 | Discovered by | Pierre Curie | Q37463 |  |  |  |  | normal |  |
| P138 | Named after | radioactivity | Q11448 |  |  |  |  | normal |  |
| P31 | Instance of | chemical element | Q11344 |  |  |  |  | normal |  |
| P1086 | Atomic number | 88 |  | 88 |  |  |  | normal |  |
| P233 | Canonical SMILES | [Ra] |  |  |  |  |  | normal | PubChem |
| P274 | Formula | Ra |  |  |  |  |  | normal | PubChem |
| P575 | Discovered | 1898 |  |  |  |  |  | normal | http://www.rsc.org/periodic-table/element/88/radium |
| P487 | Unicode character | 鐳 |  |  |  |  |  | normal | https://www.cns11643.gov.tw/wordView.jsp?ID=97078 |
| P1108 | Electronegativity | 0.9 |  | 0.9 |  |  |  | normal |  |
| P361 | Part of | period 7 | Q244979 |  |  |  |  | normal |  |
| P361 | Part of | alkaline earth metal | Q19563 |  |  |  |  | normal |  |
| P1889 | Different from | Rad | Q224047 |  |  |  |  | normal |  |
| P10685 | Ionic radius | 1.48 ångström |  | 1.48 | ångström |  |  | normal |  |
| P10685 | Ionic radius | 1.7 ångström |  | 1.7 | ångström |  |  | normal |  |
| P8000 | Electron configuration | [Rn] 7s² |  |  |  |  |  | normal |  |
| P1121 | Oxidation state | 2 |  | 2 |  |  |  | normal |  |
| P690 | Space group | space group Im-3m | Q15041897 |  |  |  |  | normal |  |
| P556 | Crystal system | body-centered cubic | Q851536 |  |  |  |  | normal |  |
| P2101 | Melting point | 973 K |  | 973 | K |  |  | normal |  |
| P2102 | Boiling point | 2,010 K |  | 2010 | K |  |  | normal |  |
| P2054 | Density | 5,500 kg/m³ |  | 5500 | kg/m³ |  |  | normal |  |
| P2068 | Thermal conductivity | 19 watt per metre kelvin |  | 19 | watt per metre kelvin |  |  | normal |  |
| P2055 | Electrical conductivity | 1,000,000 siemens per metre |  | 1000000 | siemens per metre |  |  | normal |  |
| P5679 | Electrical resistivity | 1e-6 ohm metre |  | 0.000001 | ohm metre |  |  | normal |  |
| P279 | Subclass of | alkaline earth metal | Q19563 |  |  |  |  | normal |  |
| P279 | Subclass of | s-block | Q208106 |  |  |  |  | normal |  |
| P589 | Point group | cubic-hexoctahedral | Q13359931 |  |  |  |  | normal |  |
| P2260 | Ionization energy | 5.2784 eV |  | 5.2784239 | eV |  |  | normal | https://physics.nist.gov/asd |
| P2260 | Ionization energy | 10.1472 eV |  | 10.14718 | eV |  |  | normal | https://physics.nist.gov/asd |
| P2260 | Ionization energy | 31 eV |  | 31 | eV |  |  | normal | https://physics.nist.gov/asd |
| P898 | IPA transcription | ˈreɪdiəm |  |  |  |  |  | normal |  |
| P2067 | Mass | 226.0254 Da |  | 226.0254103 | Da |  |  | normal | https://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=&ascii=ascii2&isotype=all |
| P14936 | Atomic radius | 215 picometre |  | 215 | picometre |  |  | normal |  |
| P14937 | Covalent radius | 221 picometre |  | 221 | picometre |  |  | normal |  |
| P10920 | AEDA subject keyword ID | 17547 |  |  |  |  |  | normal | http://www.environmentdata.org/archive/vocabpref:17547 |
| P12451 | Arabic Ontology lexical concept ID | 151078521 |  |  |  |  |  | normal | https://ontology.birzeit.edu/lexicalconcept/151078521 |
| P7033 | Australian Educational Vocabulary ID | scot/3564 |  |  |  |  |  | normal | https://vocabulary.curriculum.edu.au/scot/3564.html |
| P2581 | BabelNet ID | 00006920n |  |  |  |  |  | normal | https://babelnet.org/synset?id=bn%00006920n&lang=EN |
| P268 | Bibliothèque nationale de France ID | 11979118t |  |  |  |  |  | normal | https://catalogue.bnf.fr/ark:/12148/cb11979118t |
| P508 | BNCF Thesaurus ID | 18888 |  |  |  |  |  | normal | https://thes.bncf.firenze.sbn.it/termine.php?id=18888 |
| P5019 | Brockhaus Enzyklopädie online ID | radium |  |  |  |  |  | normal | https://brockhaus.de/ecs/enzy/article/radium |
| P8072 | CAB ID | 18810 |  |  |  |  |  | normal | https://www.cabi.org/cabithesaurus/mtwdk.exe?k=default&l=60&w=18810&s=5&t=2 |
| P231 | CAS Registry Number | 7440-14-4 |  |  |  |  |  | normal | https://commonchemistry.cas.org/detail?cas_rn=7440-14-4 |
| P683 | ChEBI ID | 33325 |  |  |  |  |  | normal | https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:33325 |
| P661 | ChemSpider ID | 4886483 |  |  |  |  |  | normal | https://www.chemspider.com/Chemical-Structure.4886483.html |
| P9824 | COD ID | 1509139 |  |  |  |  |  | normal | https://www.crystallography.net/cod/1509139.html |
| P1036 | Dewey Decimal Classification | 546.396 |  |  |  |  |  | normal |  |
| P8494 | DSSTOX compound identifier | DTXCID70875702 |  |  |  |  |  | normal | https://comptox.epa.gov/dashboard/DTXCID70875702 |
| P3117 | DSSTox substance ID | DTXSID2024294 |  |  |  |  |  | normal | https://comptox.epa.gov/dashboard/chemical/details/DTXSID2024294 |
| P232 | EC number | 231-122-4 |  |  |  |  |  | normal | https://www.echa.europa.eu/information-on-chemicals/ec-inventory/-/dislist/details/231-122-4 |
| P2566 | ECHA Substance Infocard ID | 100.028.293 |  |  |  |  |  | normal | https://www.echa.europa.eu/substance-information/-/substanceinfo/100.028.293 |
| P1417 | Encyclopædia Britannica Online ID | science/radium |  |  |  |  |  | normal | https://www.britannica.com/science/radium |
| P3219 | Encyclopædia Universalis ID | radium |  |  |  |  |  | normal | https://www.universalis.fr/encyclopedie/radium/ |
| P14541 | Encyclopedia of China (Third Edition) ID (2026) | 14TRzp |  |  |  |  |  | normal | https://www.zgbk.com/ecph/words?SiteID=1&ID=14TRzp |
| P10565 | Encyclopedia of China (Third Edition) old ID (2021) | 184938 |  |  |  |  |  | normal | https://web.archive.org/web/0/https://www.zgbk.com/ecph/words?SiteID=1&ID=184938 |
| P5357 | Encyclopedia of Science Fiction ID | radium |  |  |  |  |  | normal | https://www.sf-encyclopedia.com/entry/radium |
| P646 | Freebase ID | /m/025scm7 |  |  |  |  |  | normal | https://www.google.com/search?kgmid=/m/025scm7 |
| P227 | GND ID | 4176842-5 |  |  |  |  |  | normal | https://d-nb.info/gnd/4176842-5 |
| P7502 | Golden ID (archived) | Radium-ZX5K8 |  |  |  |  |  | normal | https://web.archive.org/web/0/https://golden.com/wiki/Radium-ZX5K8 |
| P4342 | Great Norwegian Encyclopedia ID | radium |  |  |  |  |  | normal | https://wikidata-externalid-url.toolforge.org/?p=4342&url_prefix=https://snl.no/&id=radium |
| P11514 | Great Russian Encyclopedia portal ID | radii-8d7b04 |  |  |  |  |  | normal | https://bigenc.ru/c/radii-8d7b04 |
| P13772 | Harper's tag | radium |  |  |  |  |  | normal | https://harpers.org/tag/radium/ |
| P7982 | Hrvatska enciklopedija ID | radij |  |  |  |  |  | normal | https://www.enciklopedija.hr/clanak/radij |
| P234 | InChI | InChI=1S/Ra |  |  |  |  |  | normal | https://chemapps.stolaf.edu/jmol/jmol.php?&model=InChI%3D1S/Ra |
| P235 | InChIKey | HCWPIIXVSYCSAN-UHFFFAOYSA-N |  |  |  |  |  | normal | https://www.ncbi.nlm.nih.gov/sites/entrez?cmd=search&db=pccompound&term=%22HCWPIIXVSYCSAN-UHFFFAOYSA-N%22%5BInChIKey%5D |
| P5063 | Interlingual Index ID | i113992 |  |  |  |  |  | normal | https://globalwordnet.github.io/cili/i113992 |
| P8189 | J9U entity ID | 987007560614605171 |  |  |  |  |  | normal | https://www.nli.org.il/en/authorities/987007560614605171 |
| P3827 | JSTOR topic ID (archived) | radium |  |  |  |  |  | normal | https://web.archive.org/web/*/https://www.jstor.org/topic/radium |
| P8408 | KBpedia ID | Radium |  |  |  |  |  | normal | https://kbpedia.org/knowledge-graph/reference-concept/?uri=Radium |
| P6385 | Krugosvet article (archived) | nauka_i_tehnika/himiya/RADI.html |  |  |  |  |  | normal | https://web.archive.org/web/2025/https://www.krugosvet.ru/enc/nauka_i_tehnika/himiya/RADI.html |
| P6058 | Larousse ID | divers/radium/85361 |  |  |  |  |  | normal | https://www.larousse.fr/encyclopedie/divers/radium/85361 |
| P8313 | Lex ID | radium |  |  |  |  |  | normal | https://wikidata-externalid-url.toolforge.org/?p=8313&url_prefix=https://lex.dk/&id=radium |
| P244 | Library of Congress Authorities ID | sh85110804 |  |  |  |  |  | normal | https://id.loc.gov/authorities/sh85110804 |
| P486 | MeSH descriptor ID | D011883 |  |  |  |  |  | normal | https://meshb.nlm.nih.gov/record/ui?ui=D011883 |
| P672 | MeSH tree code | D01.268.271.770 |  |  |  |  |  | normal | https://id.nlm.nih.gov/mesh/D01.268.271.770 |
| P6366 | Microsoft Academic ID (discontinued) | 550196577 |  |  |  |  |  | normal | https://web.archive.org/web/https://academic.microsoft.com/v2/detail/550196577 |
| P12596 | Museum-digital tag ID | 40976 |  |  |  |  |  | normal | https://term.museum-digital.de/md-de/tag/40976 |
| P8885 | Namuwiki ID | 라듐 |  |  |  |  |  | normal | https://namu.wiki/w/%EB%9D%BC%EB%93%90 |
| P950 | National Library of Spain SpMaBN ID | XX526711 |  |  |  |  |  | normal | https://datos.bne.es/resource/XX526711 |
| P349 | NDL Authority ID | 00569336 |  |  |  |  |  | normal | https://id.ndl.go.jp/auth/ndlna/00569336 |
| P3222 | NE.se ID | radium |  |  |  |  |  | normal | https://www.ne.se/uppslagsverk/encyklopedi/lång/radium |
| P6900 | NicoNicoPedia word article ID | ラジウム |  |  |  |  |  | normal | https://dic.nicovideo.jp/a/%E3%83%A9%E3%82%B8%E3%82%A6%E3%83%A0 |
| P691 | NL CR AUT ID | ph150526 |  |  |  |  |  | normal | https://aleph.nkp.cz/F/?func=find-c&local_base=aut&ccl_term=ica=ph150526 |
| P1245 | OmegaWiki Defined Meaning | 347064 |  |  |  |  |  | normal | http://www.omegawiki.org/DefinedMeaning:(347064) |
| P7305 | Online PWN Encyclopedia ID | 3965238 |  |  |  |  |  | normal | https://web.archive.org/web/2/https://encyklopedia.pwn.pl/haslo/;3965238.html |
| P10283 | OpenAlex ID | C550196577 |  |  |  |  |  | normal | https://openalex.org/C550196577 |
| P10890 | PM20 ware ID | 143761 |  |  |  |  |  | normal | https://pm20.zbw.eu/category/ware/i/143761 |
| P6781 | ProofWiki ID | Definition:Radium |  |  |  |  |  | normal | https://proofwiki.org/wiki/Definition%3ARadium |
| P1051 | PSH ID | 5755 |  |  |  |  |  | normal | https://psh.techlib.cz/skos/PSH5755 |
| P662 | PubChem CID | 6328144 |  |  |  |  |  | normal | https://pubchem.ncbi.nlm.nih.gov/compound/6328144 |
| P3417 | Quora topic ID | Radium |  |  |  |  |  | normal | https://www.quora.com/topic/Radium |
| P7775 | RationalWiki ID | Radium |  |  |  |  |  | normal | https://rationalwiki.org/wiki/Radium |
| P3345 | RxNorm CUI | 1546450 |  |  |  |  |  | normal | https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=1546450 |
| P10376 | ScienceDirect topic ID | chemistry/radium |  |  |  |  |  | normal | https://www.sciencedirect.com/topics/chemistry/radium |
| P5082 | Store medisinske leksikon ID | radium |  |  |  |  |  | normal | https://wikidata-externalid-url.toolforge.org/?p=5082&url_prefix=https://sml.snl.no/&id=radium |
| P2877 | SureChEMBL ID | 29353527 |  |  |  |  |  | normal | https://www.surechembl.org/chemical/29353527 |
| P3365 | Treccani ID | radio_res-fda11266-e1eb-11df-9962-d5ce3506d72e |  |  |  |  |  | normal | https://www.treccani.it/enciclopedia/radio_res-fda11266-e1eb-11df-9962-d5ce3506d72e |
| P10913 | UK Archival Thesaurus ID | f2/mt225/4347/5017 |  |  |  |  |  | normal | https://ukat.aim25.com/thesaurus/f2/mt225/4347/5017 |
| P2892 | UMLS CUI | C0034625 |  |  |  |  |  | normal | https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncim/C0034625 |
| P3916 | UNESCO Thesaurus ID | concept14022 |  |  |  |  |  | normal | https://vocabularies.unesco.org/thesaurus/concept14022 |
| P11089 | UniChem compound ID | 27202783 |  |  |  |  |  | normal | https://www.ebi.ac.uk/unichem/compoundsources?type=uci&compound=27202783 |
| P652 | UNII | W90AYD6R3Q |  |  |  |  |  | normal | https://gsrs.ncats.nih.gov/ginas/app/beta/substances/W90AYD6R3Q |
| P11095 | USGS Thesaurus ID | 1551 |  |  |  |  |  | normal | https://apps.usgs.gov/thesaurus/term-simple.php?thcode=2&code=1551 |
| P12800 | Vikidia article ID | es:Radio_(elemento_químico) |  |  |  |  |  | normal | https://central.vikidia.org/wiki/es%3ARadio_(elemento_qu%C3%ADmico) |
| P12086 | WikiKids ID | Radium |  |  |  |  |  | normal | https://wikikids.nl/Radium |
| P8814 | WordNet 3.1 Synset ID | 14676100-n |  |  |  |  |  | normal | https://en-word.net/view/synset/14676100-n |
| P13591 | Yale LUX ID | concept/a6eaf252-4c90-4d5f-8e4e-afeec8090450 |  |  |  |  |  | normal | https://lux.collections.yale.edu/view/concept/a6eaf252-4c90-4d5f-8e4e-afeec8090450 |
| P2347 | YSO ID | 19781 |  |  |  |  |  | normal | https://www.yso.fi/onto/yso/p19781 |

Source: https://aidb.si/e/radium-Q1128 — Wikidata (CC0) via AIDB