Unified Elements Directory

(UED)


Canonical, registry-ready directory aligning isotopes, roles, and applications.


Z 1–10

ZSymbolElementKey IsotopesImmediate RoleApplications
1HHydrogen1H, 2H(D), 3HLife, water, fusionWater, fuels, fusion
2HeHelium3He, 4HeCryogenics, fusionMRI cooling, superfluids
3LiLithium6Li, 7LiBatteries, fusion targetsLi-ion storage, ceramics
4BeBeryllium9BeAlloys, neutron reflectorAerospace, moderators
5BBoron10B, 11BNeutron capture, therapyControl rods, BNCT
6CCarbon12C, 13C, 14CLife, materials, datingPolymers, graphite/diamond
7NNitrogen14N, 15NProteins/DNA, fertilizersAmmonia cycle, atmosphere
8OOxygen16O, 17O, 18ORespiration, waterMedicine, oxidants, steel
9FFluorine19FMedicinals, polymersPTFE, tooth enamel
10NeNeon20Ne, 21Ne, 22NeLighting, cryogenicsNeon lamps, lasers

Z 11–20

ZSymbolElementKey IsotopesImmediate RoleApplications
11NaSodium23NaElectrolyte, biochemMedicine, salts
12MgMagnesium24Mg, 25Mg, 26MgEnzymes, chlorophyllAlloys, nutrition
13AlAluminum27AlMaterials, conductorsAerospace, packaging
14SiSilicon28Si, 29Si, 30SiSemiconductors, glassChips, solar PV
15PPhosphorus31PDNA/ATP backboneFertilizers, NMR (31P)
16SSulfur32S, 33S, 34S, 36SProteins, environmentVulcanization, sulfuric acid
17ClChlorine35Cl, 37ClElectrolyte, disinfectantPVC, water treatment
18ArArgon36Ar, 38Ar, 40ArInert gas, datingWelding, K–Ar dating
19KPotassium39K, 40K, 41KNerves, datingFertilizer, medicine
20CaCalcium40Ca, 44Ca, 48CaBones, signalingCement, biomaterials

Z 21–30

ZSymbolElementKey IsotopesImmediate RoleApplications
21ScScandium45ScAlloys, lightingAerospace, lamps
22TiTitanium46–50TiBiomaterials, strengthImplants, aerospace
23VVanadium50V, 51VCatalysis, alloysSteel hardening
24CrChromium50–54CrMetallurgy, pigmentsStainless steel
25MnManganese55MnEnzymes, alloysBatteries, steel
26FeIron54–58FeHemoglobin, coresConstruction, catalysts
27CoCobalt59Co, 60CoB12, magnets, radiotherapyAlloys, medical γ-source
28NiNickel58–64NiCatalysis, alloysSuperalloys, coins
29CuCopper63Cu, 65CuConductivity, enzymesWiring, antimicrobial
30ZnZinc64–70ZnEnzymes, immunityGalvanization, alloys

Z 31–40

ZSymbolElementKey IsotopesImmediate RoleApplications
31GaGallium69Ga, 71GaSemiconductorsLEDs, photovoltaics
32GeGermanium70–76GeSemiconductors, detectorsIR optics, electronics
33AsArsenic75AsSemiconductors, toxicologyMedicinal, GaAs
34SeSelenium74–82SeEnzymes, solarGlass, photovoltaics
35BrBromine79Br, 81BrChemistry, tracersFlame retardants, medicine
36KrKrypton78–86KrLighting, lasersNuclear tracers
37RbRubidium85Rb, 87RbClocks, datingLasers, chronometers
38SrStrontium84–88SrDating, materials90Sr therapy, ceramics
39YYttrium89YSuperconductors, lasersAlloys, YBCO
40ZrZirconium90–96ZrNuclear claddingAlloys, ceramics

Z 41–50

ZSymbolElementKey IsotopesImmediate RoleApplications
41NbNiobium93NbSuperconductorsMRI magnets, alloys
42MoMolybdenum92–100MoEnzymes, catalysisImaging, fertilizers
43TcTechnetium99mTcMedical imagingSPECT tracer
44RuRuthenium96–106RuCatalysts, electronicsSolar, medicine
45RhRhodium103RhCatalysis, alloysIndustry, jewelry
46PdPalladium102–110PdH storage, catalysisFuel cells, jewelry
47AgSilver107Ag, 109AgConductors, medicineElectronics, tracers
48CdCadmium106–116CdNeutron absorbersControl rods, pigments
49InIndium113In, 115InSemiconductorsITO, touchscreens
50SnTin112–124SnAlloys, datingSolder, bronze

Z 51–60

ZSymbolElementKey IsotopesImmediate RoleApplications
51SbAntimony121Sb, 123SbSemiconductors, tracersAlloys, diodes
52TeTellurium120–130TeThermoelectricsSolar cells, alloys
53IIodine127I, 131IEndocrine, therapyThyroid hormones, radiotherapy
54XeXenon124–136XeImaging, tracersMRI, anesthesia
55CsCesium133Cs, 137CsTimekeeping, falloutAtomic clocks, monitoring
56BaBarium130–138BaCeramics, tracersSuperconductors, medicine
57LaLanthanum138La, 139LaCatalysts, datingAlloys, optics
58CeCerium136–142CeCatalysts, fissionGlass polishing, reactors
59PrPraseodymium141PrMagnets, ceramicsPhosphors, alloys
60NdNeodymium142–150NdMagnets, lasersRenewables, magnets

Z 61–70

ZSymbolElementKey IsotopesImmediate RoleApplications
61PmPromethium145Pm, 147PmBetavoltaics, tracersLuminous paint, gauges
62SmSamarium144–154SmNeutron absorber, magnetsControl rods, SmCo magnets
63EuEuropium151, 153EuPhosphors, tracersLEDs, lasers
64GdGadolinium152–160GdMRI contrast, absorbersMedicine, reactors
65TbTerbium159TbPhosphors, magnetsLasers, electronics
66DyDysprosium156–164DyMagnets, shieldingTurbines, reactors
67HoHolmium165HoMagnetic alloys, therapyNuclear medicine
68ErErbium162–170ErOptical amplifiersTelecom, lasers
69TmThulium169TmPortable X-ray, therapyLasers, gauges
70YbYtterbium168–176YbQuantum optics, lasersAtomic clocks, superconductors

Z 71–80

ZSymbolElementKey IsotopesImmediate RoleApplications
71LuLutetium175, 176, 177LuTherapy, datingRadiotherapy, geochronology
72HfHafnium174–180HfReactors, superalloysControl rods, aerospace
73TaTantalum181TaElectronics, isomerCapacitors, turbines
74WTungsten180–186WSuperalloys, geochronLighting, aerospace
75ReRhenium185Re, 187ReCatalysts, datingPt–Re catalysts, geochron
76OsOsmium184–192OsGeochemistry, alloysCore–mantle tracer
77IrIridium191, 193IrCatalysts, radiotherapyIndustry, impact marker
78PtPlatinum190–198PtCatalysts, fuel cellsChemistry, jewelry
79AuGold197AuValue, therapyFinance, nanotech
80HgMercury196–204HgEnv. cycles, medicinePollution tracers

Z 81–90

ZSymbolElementKey IsotopesImmediate RoleApplications
81TlThallium203, 205TlToxicology, imagingCardiac imaging
82PbLead204–208PbShielding, datingRadiation, sediments
83BiBismuth209BiAlloys, tracersPharma, decay studies
84PoPolonium210PoRTGs, α-therapySpace power, medicine
85AtAstatine210, 211AtTargeted α-therapyCancer research
86RnRadon222RnEnvironmental hazardHealth physics
87FrFrancium223FrNuclear researchActinium chain
88RaRadium223–228RaRadiotherapy, tracersGeology, medicine
89AcActinium225AcTargeted α-therapyCancer treatment
90ThThorium232ThFuel, datingMSR fuel, U–Th dating

Z 91–100

ZSymbolElementKey IsotopesImmediate RoleApplications
91PaProtactinium231PaGeochronology, fuelOcean sediments
92UUranium233–238UFuel, datingReactors, weapons
93NpNeptunium237NpWaste tracer, fuel linkNuclear cycle
94PuPlutonium238–242PuFuel, RTGs, wasteReactors, NASA probes
95AmAmericium241AmDevices, wasteSmoke detectors, medicine
96CmCurium244–247CmHeat sources, wasteRTGs, stewardship
97BkBerkelium247, 249BkResearch, precursorSuperheavy synthesis
98CfCalifornium249–252CfNeutron sourceReactors, therapy
99EsEinsteinium252–253EsResearch, synthesisProducing Md
100FmFermium255–257FmResearchHeavy actinide studies

Z 101–110

ZSymbolElementKey IsotopesImmediate RoleApplications
101MdMendelevium258MdResearchNuclear chemistry
102NoNobelium259NoResearchShell studies
103LrLawrencium266LrResearchActinide closure
104RfRutherfordium261RfResearchTransactinide opener
105DbDubnium262DbResearchNuclear structure
106SgSeaborgium265–269SgResearchHeavy-ion synthesis
107BhBohrium267–271BhResearchNuclear shell
108HsHassium269–271HsResearchSuperheavy studies
109MtMeitnerium276–278MtResearchNuclear experiments
110DsDarmstadtium279–281DsResearchShell structure

Z 111–118

ZSymbolElementKey IsotopesImmediate RoleApplications
111RgRoentgenium280–282RgResearchSymbolic codon
112CnCopernicium283–285CnResearchSuperheavy frontier
113NhNihonium278–284NhResearchCultural codon
114FlFlerovium287–289FlResearchShell stability
115McMoscovium287–289McResearchGeopolitical codon
116LvLivermorium291–293LvResearchInstitutional codon
117TsTennessine293–294TsResearchRegional codon
118OgOganesson294OgResearch frontierHeaviest element

📊 Analytics hooks

  • Isotope spread → stable vs radioactive counts
  • Roles by sector → Biochem, Energy, Materials, Research
  • Element–application network → edges ready for Knowledge Graph import

Elements One Through One Hundred Eighteen – SolveForce Communications


📖 ULCS Isotope Atlas — Master File – SolveForce Communications


Enriching the Circular Economy Integration – SolveForce Communications