{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T22:32:02Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 2, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-05T23:50:00Z", "ingestedAt": "2026-10-05T20:45:19+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "revisions": [ { "at": "2026-10-07T11:05:13+00:00", "engine": "codex", "fields": [ "definition" ], "answering_review": "0568ff272cc6ed92b15bca60bef968ba509fbdcf541ee9a5029c4b6fc966969b" } ], "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T12:16:28+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q11344", "registryId": "vr.tr.chemical-element", "name": "chemical element", "version": "0.2.0-wave.2", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q11344/", "model": { "registry_id": "vr.tr.chemical-element", "name": "chemical element", "purpose": "Let an agent explain what chemical elements are and how the periodic table organises them, provide element data with sources, describe discovery and naming, and support chemistry learning.", "definition": "A chemical element is a species of atoms defined by the same number of protons in the atomic nucleus, called its atomic number, whether those atoms occur in an elementary substance or within compounds; its isotopes differ in neutron number and may differ in mass and stability while sharing broadly similar chemical properties, and elements are organised in the periodic table, classified as metals, non-metals and metalloids, and form the basis of chemistry, materials and life.", "what_it_is_for": "The fundamental substances of chemistry.", "affordances": [ "explain elements and the periodic table", "provide element properties with sources", "describe discovery and naming", "support learning" ], "distinguishing_features": [ "Defined by atomic number", "Isotopes vary", "Periodic properties", "Building blocks of matter" ], "appearance": "Metals, gases, liquids and solids depending on the element.", "visual_identification": [ "Atoms with the same atomic number", "Organised in the periodic table", "Compounds contain more than one element" ], "physical_properties": [ { "quantity": "Atomic number", "unit": "dimensionless", "typical_range": "", "note": "Atomic number is the number of protons in each atomic nucleus and determines the element's identity." }, { "quantity": "Atomic mass", "unit": "unified atomic mass units", "typical_range": "", "note": "Atomic mass is determined for a specified isotope, while a sample average depends on its isotopic composition." }, { "quantity": "Mass density", "unit": "kilograms per cubic meter", "typical_range": "", "note": "Density is measured as sample mass divided by volume at a stated temperature, pressure and physical form." }, { "quantity": "Melting temperature", "unit": "kelvin", "typical_range": "", "note": "Melting temperature is determined from solid and liquid phase equilibrium at a stated pressure where a liquid phase exists." } ], "families_and_kinds": [ "metals", "non-metals", "metalloids", "noble gases and other groups", "synthetic and superheavy elements" ], "related_models": [ { "relation": "is a kind of", "target": "chemical substance", "why": "category" }, { "relation": "includes", "target": "iron", "why": "an example" }, { "relation": "includes", "target": "lead", "why": "an example" }, { "relation": "is related to", "target": "Abundance of elements in Earth crust", "why": "abundance data" } ], "identifiers": [], "standards_and_regulation": [ "IUPAC element names, symbols and atomic weights", "Chemical safety classifications", "No regulation of elements as concepts" ], "failure_modes_and_hazards": [ "Confusing elements with compounds", "Outdated atomic weights or names", "Hazardous elements handled unsafely" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Report an element's symbol, atomic number and current standard atomic weight from the official tables.", "Distinguish an element from its compounds and isotopes when describing it.", "Point to the hazard information that applies to an element's common forms." ], "must_not": [ "Use superseded names, symbols or atomic weights as if they were current.", "Assist in obtaining or using toxic, radioactive or reactive elements to harm people.", "Treat a hazardous element as safe because its compounds are harmless, or the reverse.", "Present unconfirmed claims of new elements as accepted." ], "requires_human": [ "Handling or releasing radioactive or highly toxic elements in any physical setting." ] }, "ethics": { "considerations": [ "Some elements are toxic or radioactive; their handling affects workers and neighbours.", "Mining for elements carries environmental and labour costs for local communities." ], "affected_parties": [ "Workers handling materials", "Communities near mines and plants", "Students" ] }, "owners": { "steward": "Nobody owns the elements; names and atomic weights are set by the international chemistry body.", "master_systems": [ "Periodic table and atomic weight tables of the international chemistry union" ] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q11344: chemical element", "url": "https://www.wikidata.org/wiki/Q11344", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Chemical element", "url": "https://en.wikipedia.org/wiki/Chemical_element", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "define", "name": "Define", "description": "What an element is.", "rationale": "Concepts.", "layers": [ { "id": "concept", "name": "Concept", "description": "Elements and atoms.", "findings": [ { "id": "concept-finding", "name": "Concept", "description": "Concept.", "questions": [ { "text": "What defines a chemical element, and how do isotopes and ions relate to it?", "kind": "definition" }, { "text": "How does an element differ from a compound or a mixture?", "kind": "definition" } ] } ] }, { "id": "table", "name": "Table", "description": "The periodic table.", "findings": [ { "id": "table-finding", "name": "Table", "description": "Periodic table.", "questions": [ { "text": "How does the periodic table organise elements, and what do groups and periods indicate?", "kind": "definition" }, { "text": "Which trends run across the table?", "kind": "definition" } ] } ] } ] }, { "id": "data", "name": "Data", "description": "Element properties.", "rationale": "Sources.", "layers": [ { "id": "lookup", "name": "Lookup", "description": "A specific element.", "findings": [ { "id": "lookup-finding", "name": "Lookup", "description": "Lookup.", "questions": [ { "text": "What are the properties, isotopes and uses of this element, according to IUPAC and reference data?", "kind": "provenance" }, { "text": "Which entry fits it?", "kind": "action" } ] } ] }, { "id": "abundance", "name": "Abundance", "description": "Where elements come from.", "findings": [ { "id": "abundance-finding", "name": "Abundance", "description": "Abundance.", "questions": [ { "text": "How abundant is this element in the crust, the Earth and the universe, and how was it formed?", "kind": "provenance" }, { "text": "How is it obtained?", "kind": "provenance" } ] } ] } ] }, { "id": "discover", "name": "Discover", "description": "Discovery and naming.", "rationale": "History.", "layers": [ { "id": "history", "name": "History", "description": "History of elements.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How were the elements discovered, and how did the periodic table develop?", "kind": "provenance" }, { "text": "How are new elements confirmed and named by IUPAC?", "kind": "provenance" } ] } ] }, { "id": "synthetic", "name": "Synthetic", "description": "Synthetic elements.", "findings": [ { "id": "synthetic-finding", "name": "Synthetic", "description": "Synthetic elements.", "questions": [ { "text": "How are superheavy elements synthesised, and what is the island of stability?", "kind": "provenance" }, { "text": "Which elements are the newest?", "kind": "provenance" } ] } ] } ] }, { "id": "learn", "name": "Learn", "description": "Teaching and safety.", "rationale": "Education.", "layers": [ { "id": "teach", "name": "Teach", "description": "Teaching elements.", "findings": [ { "id": "teach-finding", "name": "Teach", "description": "Teaching.", "questions": [ { "text": "How can elements and the periodic table be taught engagingly?", "kind": "action" }, { "text": "Which misconceptions arise?", "kind": "provenance" } ] } ] }, { "id": "safety", "name": "Safety", "description": "Hazardous elements.", "findings": [ { "id": "safety-finding", "name": "Safety", "description": "Safety.", "questions": [ { "text": "Which elements are hazardous, and what safety rules apply to handling them?", "kind": "provenance" }, { "text": "Is there an exposure incident now?", "kind": "boundary" } ] } ] } ] } ] }, "openQuestions": [ "Should each element be linked to its entry?", "How should IUPAC data be linked?", "How should educational resources be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }