{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.einsteinium","code":"thing-q1892","url":"https://ver.cy/models/thing/q1892/","name":"einsteinium","alternateNames":["einsteinium-240","einsteinium-241","einsteinium-242","einsteinium-243","einsteinium-244","einsteinium-245","einsteinium-246","einsteinium-247","einsteinium-248","einsteinium-249","einsteinium-250","einsteinium-251"],"kind":"thing","status":"published","version":"0.2.0-wave.4","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 synthetic radioactive actinide element with atomic number 99, symbol Es, discovered in 1952 in the debris of the first hydrogen bomb test and named after Albert Einstein, produced in minute quantities in high-flux reactors, with isotopes from about einsteinium-240 to einsteinium-258 of which einsteinium-252 has the longest half-life of about 472 days and einsteinium-253 is the most available; einsteinium is used only in research. The model gives public reference information only.","purpose":"Let an agent explain einsteinium and its discovery, relay properties, isotopes and research uses from chemistry references at a public level, describe the isotopes the registry aliases name as a group, and distinguish einsteinium from neighbouring actinides such as californium and fermium, without operational nuclear detail.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Synthetic actinide","Micrograms only","Named for Einstein","Research use"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What einsteinium is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is einsteinium, and how does it differ from californium and fermium?","kind":"definition"},{"text":"Is the question about public reference facts, or operational detail the model does not give?","kind":"boundary"}]}]},{"id":"isotopes","name":"Isotopes","description":"Isotopes.","findings":[{"id":"isotopes-finding","name":"Isotopes","description":"Isotopes.","questions":[{"text":"What are the main einsteinium isotopes and their half-lives?","kind":"definition"},{"text":"Which entry fits isotopes of einsteinium?","kind":"action"}]}]}]},{"id":"science","name":"Science","description":"Chemistry.","layers":[{"id":"properties","name":"Properties","description":"Properties.","findings":[{"id":"properties-finding","name":"Properties","description":"Properties.","questions":[{"text":"What is known about einsteinium chemistry from microgram studies?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"production","name":"Production","description":"Production.","findings":[{"id":"production-finding","name":"Production","description":"Production.","questions":[{"text":"Where is einsteinium produced, at a general level?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"research","name":"Research","description":"Research uses.","layers":[{"id":"heavier","name":"Heavier","description":"Heavier elements.","findings":[{"id":"heavier-finding","name":"Heavier","description":"Heavier.","questions":[{"text":"How was einsteinium used to synthesise mendelevium?","kind":"provenance"},{"text":"Which entry fits mendelevium?","kind":"action"}]}]},{"id":"studies","name":"Studies","description":"Recent studies.","findings":[{"id":"studies-finding","name":"Studies","description":"Studies.","questions":[{"text":"What did recent structural studies of einsteinium compounds report?","kind":"provenance"},{"text":"Which entry fits actinide chemistry?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and safety.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How was einsteinium discovered and kept secret until 1955?","kind":"provenance"},{"text":"Which entry fits Ivy Mike?","kind":"action"}]}]},{"id":"safety","name":"Safety","description":"Safety.","findings":[{"id":"safety-finding","name":"Safety","description":"Safety.","questions":[{"text":"What radiological hazards apply, as regulators describe?","kind":"provenance"},{"text":"Which entry fits radiation protection?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Explain einsteinium's history and properties in general terms, citing chemistry sources."],"mustNot":["Provide production, handling or weapons-related nuclear detail.","Assist in acquiring or moving radioactive material outside lawful channels.","Downplay its radiotoxicity.","List isotope data as if it were operational guidance."],"requiresHuman":["Any action involving real radioactive material."]},"ethics":{"considerations":["Radioactive materials can harm people and are controlled for good reason.","Its discovery in weapons test debris ties it to nuclear history."],"affectedParties":["Researchers","The public"]},"owners":{"steward":"The licensed facilities that produce it, under national nuclear regulators.","roles":[],"masterSystems":["National nuclear material accountancy records"]},"relations":[{"target":"Q19577","type":"parent","note":"registry parent class"},{"target":"actinide","type":"related","note":"in registry terms"},{"target":"Albert Einstein","type":"related"},{"target":"californium","type":"related","note":"and fermium"},{"target":"mendelevium","type":"related","note":"in 1955"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.einsteinium","Wikidata: Q1892 (https://www.wikidata.org/wiki/Q1892)","CAS: 7429-92-7 einsteinium","atomic number: 99"]},"properties":{"applicability":"required","items":["atomic number: 99 count","discovered: 1952 year - Ivy Mike test debris","longest-lived isotope: einsteinium-252, about 472 days note","melting point: about 860 C"]},"recognition":{"applicability":"required","items":["Actinide element 99","Einsteinium-240 to einsteinium-258 isotopes","Californium is element 98; fermium is element 100","A silvery metal that glows from its own radioactivity, available only in micrograms."]},"capabilities":{"applicability":"required","items":["explain the element","relay properties and isotopes","describe research uses","distinguish related elements"]},"hazards":{"applicability":"required","items":["Radiotoxicity","Agents giving operational nuclear detail","Registry aliases listing many isotopes"]},"interfaces":{"applicability":"required","items":["Radiation protection and nuclear material regulations","IUPAC element naming"]},"context":{"applicability":"required","items":["Scientific research.","einsteinium isotopes","einsteinium compounds such as oxides and halides","einsteinium as target for heavier elements"]}},"sources":[{"title":"Wikidata item Q1892: einsteinium","url":"https://www.wikidata.org/wiki/Q1892","note":"identity and sense of the item"},{"title":"Wikipedia: Einsteinium","url":"https://en.wikipedia.org/wiki/Einsteinium","note":"general description of the item"}],"openQuestions":["Should the isotopes be grouped as one sub-entry?","How should chemistry references be linked?","The registry entry lists isotope aliases; should they be grouped?"],"resources":{"spec":"/models/things/publications/thing-q1892/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1892/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T18:22:40Z","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 2026-10-06T19:51:56+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}