{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.radium","code":"thing-q1128","url":"https://ver.cy/models/thing/q1128/","name":"radium","alternateNames":["radium-202","radium-203","radium-203m","radium-204","radium-205","radium-205m","radium-206","radium-207","radium-207m","radium-208","radium-208m","radium-209"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A radioactive alkaline earth metal, chemical element 88, discovered by Marie and Pierre Curie in 1898 in uranium ore; its isotope radium-226 has a half-life of about 1600 years and decays to radon, it was once used in luminous paint, medicine and quack products with serious harm to workers and patients, and present uses include research and established cancer therapy with radium-223, alongside legacy radiotherapy sources.","purpose":"Let an agent explain radium as an element, relay its properties, history and hazards from reference and regulatory sources, describe legacy contamination and the radium dial painters as history, and route questions about radium in buildings or antiques to radiation protection authorities.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Radioactive alkaline earth metal","Decays to radon","Historical luminous and medical uses","Legacy contamination sites"],"structure":{"bundles":[{"id":"element","name":"Element","description":"What radium is.","layers":[{"id":"properties","name":"Properties","description":"Properties and decay.","findings":[{"id":"properties-finding","name":"Properties","description":"Properties.","questions":[{"text":"What are the properties and isotopes of radium, and how does it decay?","kind":"definition"},{"text":"Is the question about radium, radon or uranium?","kind":"boundary"}]}]},{"id":"occurrence","name":"Occurrence","description":"Occurrence.","findings":[{"id":"occurrence-finding","name":"Occurrence","description":"Occurrence.","questions":[{"text":"Where does radium occur, including in water and industrial scale?","kind":"provenance"},{"text":"Which entry fits naturally occurring radioactive material?","kind":"action"}]}]}]},{"id":"history","name":"History","description":"Discovery and use.","layers":[{"id":"discovery","name":"Discovery","description":"The Curies.","findings":[{"id":"discovery-finding","name":"Discovery","description":"Discovery.","questions":[{"text":"How was radium discovered and isolated?","kind":"provenance"},{"text":"Which entry fits Marie Curie?","kind":"action"}]}]},{"id":"uses","name":"Uses","description":"Historical uses and harm.","findings":[{"id":"uses-finding","name":"Uses","description":"Uses.","questions":[{"text":"How was radium used in paint, medicine and consumer products, and what harm followed, including to the dial painters?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"safety","name":"Safety","description":"Hazards today.","layers":[{"id":"objects","name":"Objects","description":"Radium objects.","findings":[{"id":"objects-finding","name":"Objects","description":"Objects.","questions":[{"text":"What do authorities advise about radium-painted antiques and luminous items?","kind":"provenance"},{"text":"Is the user asking about a specific object or building, which needs a radiation protection authority?","kind":"boundary"}]}]},{"id":"sites","name":"Sites","description":"Legacy sites.","findings":[{"id":"sites-finding","name":"Sites","description":"Sites.","questions":[{"text":"How are legacy contaminated sites identified and remediated?","kind":"provenance"},{"text":"Which entry fits radioactive contamination?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Science and units.","layers":[{"id":"units","name":"Units","description":"The curie.","findings":[{"id":"units-finding","name":"Units","description":"Units.","questions":[{"text":"How did radium define the curie, and how does it relate to the becquerel?","kind":"provenance"},{"text":"Which entry fits units of radioactivity?","kind":"action"}]}]},{"id":"research","name":"Research","description":"Research.","findings":[{"id":"research-finding","name":"Research","description":"Research.","questions":[{"text":"What research uses radium today, such as radium-223 in medicine?","kind":"provenance"},{"text":"Is the user asking about their own treatment, which needs a clinician?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Report radium's properties, history and hazards from authoritative sources.","Flag legacy items, such as luminous dials or old medical sources, for checks by radiation protection specialists."],"mustNot":["Help obtain, handle or dispose of radium outside licensing and radiation protection rules.","Present radium products as healthy or safe to use.","Disturb contaminated sites without radiation protection controls.","Help use radioactive material to harm people."],"requiresHuman":["Removing or disposing of radium sources or contaminated items."]},"ethics":{"considerations":["Radium harmed workers such as dial painters who were not told of the danger.","Contaminated legacy sites still expose people today."],"affectedParties":["Workers and collectors","Residents near contaminated sites","The public"]},"owners":{"steward":"The licensed holder of each source under the national radiation regulator.","roles":[],"masterSystems":["National registers of radioactive sources"]},"relations":[{"target":"Q19563","type":"parent","note":"registry parent class"},{"target":"alkaline earth metal","type":"related","note":"group 2"},{"target":"radon","type":"related","note":"its daughter"},{"target":"uranium","type":"related","note":"decay chain parent"},{"target":"Marie Curie","type":"related","note":"with Pierre Curie in 1898"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.radium","Wikidata: Q1128 (https://www.wikidata.org/wiki/Q1128)","chemical symbol: Ra","CAS number: 7440-14-4"]},"properties":{"applicability":"required","items":["atomic number: 88","half-life of radium-226: about 1600 years","historical unit: the curie unit - defined from the activity of one gram of radium-226"]},"recognition":{"applicability":"required","items":["Element 88, alkaline earth metal","Decays to radon gas","Radon is the gaseous daughter; uranium is the parent element","Silvery-white metal that blackens in air; historically seen as glowing luminous paint on dials."]},"capabilities":{"applicability":"required","items":["explain properties and decay","relay history of discovery and use","relay hazards and legacy contamination guidance","route questions about radium objects to authorities"]},"hazards":{"applicability":"required","items":["Radiation dose from ingestion and inhalation","Radon release from radium in materials","Contaminated legacy sites and objects","Historical harm to dial painters and patients"]},"interfaces":{"applicability":"required","items":["Radiation protection regulations and ICRP recommendations","Rules on naturally occurring radioactive material in industry","Regulations on radioactive antiques and luminous items","Legacy site remediation programmes"]},"context":{"applicability":"required","items":["Historically luminous paint and radiotherapy; now little practical use.","radium-226 from the uranium chain","radium-228 from the thorium chain","radium in luminous paint and antiques","radium in legacy contaminated sites","radium in water and scale from oil and gas"]}},"sources":[{"title":"Wikidata item Q1128: radium","url":"https://www.wikidata.org/wiki/Q1128","note":"identity and sense of the item"},{"title":"Wikipedia: Radium","url":"https://en.wikipedia.org/wiki/Radium","note":"general description of the item"}],"openQuestions":["Should the dial painters history be a separate entry?","How should legacy site registers be linked?","The registry entry has merged isotope aliases; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q1128/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1128/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T20:49:57Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:25+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}