{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.fluorine","code":"thing-q650","url":"https://ver.cy/models/thing/q650/","name":"fluorine","alternateNames":["fluor-uvite","fluorine-23","fluorine-24","fluorine-22","fluorine-20","fluorine-21","fluorine-29","fluorine-28","fluorine-27","fluorine-26","fluorine-25","fluorine-14"],"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":"The chemical element with symbol F and atomic number 9, the lightest halogen and the most electronegative element, whose elemental form under ordinary conditions is an extremely reactive pale yellow diatomic gas, occurring in nature predominantly in compounds such as fluorite and fluor-uvite, although rare natural occurrences of molecular fluorine are known, with one stable isotope fluorine-19 and short-lived radioisotopes such as fluorine-18 used in PET imaging and fluorine-20 to fluorine-24 studied in nuclear physics; fluorine compounds are used in refrigerants, polymers such as PTFE, pharmaceuticals, toothpaste and uranium enrichment.","purpose":"Let an agent explain fluorine and its properties, relay chemistry, isotopes, occurrence and uses from chemical references, describe safety at the level of public reference sources, and distinguish fluorine from fluoride ions, fluorite and fluorocarbons, without providing hazardous synthesis detail.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Most electronegative","Extreme reactivity","Single stable isotope","Ubiquitous compounds"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What fluorine is.","layers":[{"id":"definition","name":"Definition","description":"Definition and properties.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is fluorine, and what makes it the most reactive and electronegative element?","kind":"definition"},{"text":"Is the question about the element, an isotope, a compound or a hazardous procedure the model does not detail?","kind":"boundary"}]}]},{"id":"isotopes","name":"Isotopes","description":"Isotopes.","findings":[{"id":"isotopes-finding","name":"Isotopes","description":"Isotopes.","questions":[{"text":"What are fluorine-19, fluorine-18 and the radioisotopes fluorine-20 to fluorine-24?","kind":"definition"},{"text":"Which entry fits the specific isotope?","kind":"action"}]}]}]},{"id":"chemistry","name":"Chemistry","description":"Chemistry and occurrence.","layers":[{"id":"compounds","name":"Compounds","description":"Compounds.","findings":[{"id":"compounds-finding","name":"Compounds","description":"Compounds.","questions":[{"text":"What are the main fluorides, fluorocarbons and fluoropolymers?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"occurrence","name":"Occurrence","description":"Occurrence.","findings":[{"id":"occurrence-finding","name":"Occurrence","description":"Occurrence.","questions":[{"text":"Where does fluorine occur, in fluorite, cryolite and minerals such as fluor-uvite?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"use","name":"Use","description":"Uses and safety.","layers":[{"id":"uses","name":"Uses","description":"Uses.","findings":[{"id":"uses-finding","name":"Uses","description":"Uses.","questions":[{"text":"How is fluorine used in refrigerants, polymers, pharmaceuticals, PET imaging and toothpaste?","kind":"provenance"},{"text":"Which entry fits the specific application?","kind":"action"}]}]},{"id":"safety","name":"Safety","description":"Safety and environment.","findings":[{"id":"safety-finding","name":"Safety","description":"Safety.","questions":[{"text":"What hazards do fluorine and fluoride compounds pose, and what are the PFAS and fluoridation debates, with positions attributed?","kind":"provenance"},{"text":"Is the presentation at public reference level and neutral?","kind":"boundary"}]}]}]},{"id":"context","name":"Context","description":"History.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How was fluorine isolated by Moissan in 1886 after decades of hazardous attempts?","kind":"provenance"},{"text":"Which entry fits Henri Moissan?","kind":"action"}]}]},{"id":"biology","name":"Biology","description":"Biology.","findings":[{"id":"biology-finding","name":"Biology","description":"Biology.","questions":[{"text":"What role does fluorine play in teeth and bones, in general terms?","kind":"provenance"},{"text":"Which entry fits fluoride therapy?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Describe fluorine's properties, position in the periodic table and occurrence in minerals.","Explain the difference between elemental fluorine and fluoride ions.","Summarise debates on fluoridation and fluorinated chemicals with attributed sources."],"mustNot":["Give instructions for producing, handling or releasing elemental fluorine or its hazardous compounds.","Assist anyone in using fluorine compounds to harm people.","Present fluoride and elemental fluorine as the same substance.","Present one side of fluoridation or chemical pollution disputes as settled without evidence."],"requiresHuman":["Any handling or transport of fluorine or its reactive compounds.","Advice on water fluoridation decisions for a community."]},"ethics":{"considerations":["Fluorine and some of its compounds are among the most dangerous substances to people nearby.","Persistent fluorinated chemicals affect communities who did not choose exposure."],"affectedParties":["Workers and bystanders","Communities near industrial sites","Water consumers"]},"owners":{"steward":"Nobody owns the element; chemical safety regulators control its industrial use.","roles":[],"masterSystems":["Chemical substance and hazard databases"]},"relations":[{"target":"Q19600","type":"parent","note":"registry parent class"},{"target":"Q19605","type":"parent","note":"registry parent class"},{"target":"Q19753344","type":"parent","note":"registry parent class"},{"target":"halogens","type":"related","note":"in registry terms"},{"target":"diatomic nonmetal","type":"related","note":"in registry terms"},{"target":"nonmetal","type":"related","note":"in registry terms"},{"target":"fluoride","type":"related","note":"as its anion"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.fluorine","Wikidata: Q650 (https://www.wikidata.org/wiki/Q650)","CAS: 7782-41-4 fluorine","symbol: F element symbol"]},"properties":{"applicability":"required","items":["atomic number: 9 count","standard atomic weight: 18.998 u","electronegativity: 3.98 Pauling - highest","boiling point: -188 C","stable isotopes: 1 count - fluorine-19"]},"recognition":{"applicability":"required","items":["Element 9, the lightest halogen","Fluorine-19 stable, fluorine-18 for PET, fluorine-20 to 24 radioisotopes, fluor-uvite mineral","Fluoride is the ion; fluorite is the mineral; fluorocarbons are compounds","A pale yellow gas; rarely seen outside laboratories."]},"capabilities":{"applicability":"required","items":["explain properties","relay isotopes and occurrence","describe uses and safety","distinguish related terms"]},"hazards":{"applicability":"required","items":["Agents providing hazardous handling or synthesis detail","Confusing fluorine with fluoride","Contested PFAS and fluoridation debates, to be attributed"]},"interfaces":{"applicability":"required","items":["Chemical safety regulations for fluorine and hydrogen fluoride","Montreal Protocol and Kigali Amendment for fluorinated refrigerants","PFAS regulations in the EU and US","Drinking water fluoridation standards"]},"context":{"applicability":"required","items":["Not applicable; a chemical element.","elemental fluorine gas","fluoride minerals such as fluorite, cryolite and fluor-uvite","fluorine isotopes from fluorine-14 to fluorine-31","inorganic fluorides","organofluorine compounds and fluoropolymers","fluorine in pharmaceuticals and PET tracers"]}},"sources":[{"title":"Wikidata item Q650: fluorine","url":"https://www.wikidata.org/wiki/Q650","note":"identity and sense of the item"},{"title":"Wikipedia: Fluorine","url":"https://en.wikipedia.org/wiki/Fluorine","note":"general description of the item"}],"openQuestions":["Should fluorine-18 and fluorite be separate primary entries?","How should chemical references be linked?","The registry entry has merged aliases naming isotopes and a mineral; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q650/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q650/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T07:14:03Z","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 2026-10-07T10:10:32+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}