(UED)
Canonical, registry-ready directory aligning isotopes, roles, and applications.
Z 1–10
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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1 | H | Hydrogen | 1H, 2H(D), 3H | Life, water, fusion | Water, fuels, fusion |
2 | He | Helium | 3He, 4He | Cryogenics, fusion | MRI cooling, superfluids |
3 | Li | Lithium | 6Li, 7Li | Batteries, fusion targets | Li-ion storage, ceramics |
4 | Be | Beryllium | 9Be | Alloys, neutron reflector | Aerospace, moderators |
5 | B | Boron | 10B, 11B | Neutron capture, therapy | Control rods, BNCT |
6 | C | Carbon | 12C, 13C, 14C | Life, materials, dating | Polymers, graphite/diamond |
7 | N | Nitrogen | 14N, 15N | Proteins/DNA, fertilizers | Ammonia cycle, atmosphere |
8 | O | Oxygen | 16O, 17O, 18O | Respiration, water | Medicine, oxidants, steel |
9 | F | Fluorine | 19F | Medicinals, polymers | PTFE, tooth enamel |
10 | Ne | Neon | 20Ne, 21Ne, 22Ne | Lighting, cryogenics | Neon lamps, lasers |
Z 11–20
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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11 | Na | Sodium | 23Na | Electrolyte, biochem | Medicine, salts |
12 | Mg | Magnesium | 24Mg, 25Mg, 26Mg | Enzymes, chlorophyll | Alloys, nutrition |
13 | Al | Aluminum | 27Al | Materials, conductors | Aerospace, packaging |
14 | Si | Silicon | 28Si, 29Si, 30Si | Semiconductors, glass | Chips, solar PV |
15 | P | Phosphorus | 31P | DNA/ATP backbone | Fertilizers, NMR (31P) |
16 | S | Sulfur | 32S, 33S, 34S, 36S | Proteins, environment | Vulcanization, sulfuric acid |
17 | Cl | Chlorine | 35Cl, 37Cl | Electrolyte, disinfectant | PVC, water treatment |
18 | Ar | Argon | 36Ar, 38Ar, 40Ar | Inert gas, dating | Welding, K–Ar dating |
19 | K | Potassium | 39K, 40K, 41K | Nerves, dating | Fertilizer, medicine |
20 | Ca | Calcium | 40Ca, 44Ca, 48Ca | Bones, signaling | Cement, biomaterials |
Z 21–30
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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21 | Sc | Scandium | 45Sc | Alloys, lighting | Aerospace, lamps |
22 | Ti | Titanium | 46–50Ti | Biomaterials, strength | Implants, aerospace |
23 | V | Vanadium | 50V, 51V | Catalysis, alloys | Steel hardening |
24 | Cr | Chromium | 50–54Cr | Metallurgy, pigments | Stainless steel |
25 | Mn | Manganese | 55Mn | Enzymes, alloys | Batteries, steel |
26 | Fe | Iron | 54–58Fe | Hemoglobin, cores | Construction, catalysts |
27 | Co | Cobalt | 59Co, 60Co | B12, magnets, radiotherapy | Alloys, medical γ-source |
28 | Ni | Nickel | 58–64Ni | Catalysis, alloys | Superalloys, coins |
29 | Cu | Copper | 63Cu, 65Cu | Conductivity, enzymes | Wiring, antimicrobial |
30 | Zn | Zinc | 64–70Zn | Enzymes, immunity | Galvanization, alloys |
Z 31–40
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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31 | Ga | Gallium | 69Ga, 71Ga | Semiconductors | LEDs, photovoltaics |
32 | Ge | Germanium | 70–76Ge | Semiconductors, detectors | IR optics, electronics |
33 | As | Arsenic | 75As | Semiconductors, toxicology | Medicinal, GaAs |
34 | Se | Selenium | 74–82Se | Enzymes, solar | Glass, photovoltaics |
35 | Br | Bromine | 79Br, 81Br | Chemistry, tracers | Flame retardants, medicine |
36 | Kr | Krypton | 78–86Kr | Lighting, lasers | Nuclear tracers |
37 | Rb | Rubidium | 85Rb, 87Rb | Clocks, dating | Lasers, chronometers |
38 | Sr | Strontium | 84–88Sr | Dating, materials | 90Sr therapy, ceramics |
39 | Y | Yttrium | 89Y | Superconductors, lasers | Alloys, YBCO |
40 | Zr | Zirconium | 90–96Zr | Nuclear cladding | Alloys, ceramics |
Z 41–50
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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41 | Nb | Niobium | 93Nb | Superconductors | MRI magnets, alloys |
42 | Mo | Molybdenum | 92–100Mo | Enzymes, catalysis | Imaging, fertilizers |
43 | Tc | Technetium | 99mTc | Medical imaging | SPECT tracer |
44 | Ru | Ruthenium | 96–106Ru | Catalysts, electronics | Solar, medicine |
45 | Rh | Rhodium | 103Rh | Catalysis, alloys | Industry, jewelry |
46 | Pd | Palladium | 102–110Pd | H storage, catalysis | Fuel cells, jewelry |
47 | Ag | Silver | 107Ag, 109Ag | Conductors, medicine | Electronics, tracers |
48 | Cd | Cadmium | 106–116Cd | Neutron absorbers | Control rods, pigments |
49 | In | Indium | 113In, 115In | Semiconductors | ITO, touchscreens |
50 | Sn | Tin | 112–124Sn | Alloys, dating | Solder, bronze |
Z 51–60
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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51 | Sb | Antimony | 121Sb, 123Sb | Semiconductors, tracers | Alloys, diodes |
52 | Te | Tellurium | 120–130Te | Thermoelectrics | Solar cells, alloys |
53 | I | Iodine | 127I, 131I | Endocrine, therapy | Thyroid hormones, radiotherapy |
54 | Xe | Xenon | 124–136Xe | Imaging, tracers | MRI, anesthesia |
55 | Cs | Cesium | 133Cs, 137Cs | Timekeeping, fallout | Atomic clocks, monitoring |
56 | Ba | Barium | 130–138Ba | Ceramics, tracers | Superconductors, medicine |
57 | La | Lanthanum | 138La, 139La | Catalysts, dating | Alloys, optics |
58 | Ce | Cerium | 136–142Ce | Catalysts, fission | Glass polishing, reactors |
59 | Pr | Praseodymium | 141Pr | Magnets, ceramics | Phosphors, alloys |
60 | Nd | Neodymium | 142–150Nd | Magnets, lasers | Renewables, magnets |
Z 61–70
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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61 | Pm | Promethium | 145Pm, 147Pm | Betavoltaics, tracers | Luminous paint, gauges |
62 | Sm | Samarium | 144–154Sm | Neutron absorber, magnets | Control rods, SmCo magnets |
63 | Eu | Europium | 151, 153Eu | Phosphors, tracers | LEDs, lasers |
64 | Gd | Gadolinium | 152–160Gd | MRI contrast, absorbers | Medicine, reactors |
65 | Tb | Terbium | 159Tb | Phosphors, magnets | Lasers, electronics |
66 | Dy | Dysprosium | 156–164Dy | Magnets, shielding | Turbines, reactors |
67 | Ho | Holmium | 165Ho | Magnetic alloys, therapy | Nuclear medicine |
68 | Er | Erbium | 162–170Er | Optical amplifiers | Telecom, lasers |
69 | Tm | Thulium | 169Tm | Portable X-ray, therapy | Lasers, gauges |
70 | Yb | Ytterbium | 168–176Yb | Quantum optics, lasers | Atomic clocks, superconductors |
Z 71–80
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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71 | Lu | Lutetium | 175, 176, 177Lu | Therapy, dating | Radiotherapy, geochronology |
72 | Hf | Hafnium | 174–180Hf | Reactors, superalloys | Control rods, aerospace |
73 | Ta | Tantalum | 181Ta | Electronics, isomer | Capacitors, turbines |
74 | W | Tungsten | 180–186W | Superalloys, geochron | Lighting, aerospace |
75 | Re | Rhenium | 185Re, 187Re | Catalysts, dating | Pt–Re catalysts, geochron |
76 | Os | Osmium | 184–192Os | Geochemistry, alloys | Core–mantle tracer |
77 | Ir | Iridium | 191, 193Ir | Catalysts, radiotherapy | Industry, impact marker |
78 | Pt | Platinum | 190–198Pt | Catalysts, fuel cells | Chemistry, jewelry |
79 | Au | Gold | 197Au | Value, therapy | Finance, nanotech |
80 | Hg | Mercury | 196–204Hg | Env. cycles, medicine | Pollution tracers |
Z 81–90
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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81 | Tl | Thallium | 203, 205Tl | Toxicology, imaging | Cardiac imaging |
82 | Pb | Lead | 204–208Pb | Shielding, dating | Radiation, sediments |
83 | Bi | Bismuth | 209Bi | Alloys, tracers | Pharma, decay studies |
84 | Po | Polonium | 210Po | RTGs, α-therapy | Space power, medicine |
85 | At | Astatine | 210, 211At | Targeted α-therapy | Cancer research |
86 | Rn | Radon | 222Rn | Environmental hazard | Health physics |
87 | Fr | Francium | 223Fr | Nuclear research | Actinium chain |
88 | Ra | Radium | 223–228Ra | Radiotherapy, tracers | Geology, medicine |
89 | Ac | Actinium | 225Ac | Targeted α-therapy | Cancer treatment |
90 | Th | Thorium | 232Th | Fuel, dating | MSR fuel, U–Th dating |
Z 91–100
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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91 | Pa | Protactinium | 231Pa | Geochronology, fuel | Ocean sediments |
92 | U | Uranium | 233–238U | Fuel, dating | Reactors, weapons |
93 | Np | Neptunium | 237Np | Waste tracer, fuel link | Nuclear cycle |
94 | Pu | Plutonium | 238–242Pu | Fuel, RTGs, waste | Reactors, NASA probes |
95 | Am | Americium | 241Am | Devices, waste | Smoke detectors, medicine |
96 | Cm | Curium | 244–247Cm | Heat sources, waste | RTGs, stewardship |
97 | Bk | Berkelium | 247, 249Bk | Research, precursor | Superheavy synthesis |
98 | Cf | Californium | 249–252Cf | Neutron source | Reactors, therapy |
99 | Es | Einsteinium | 252–253Es | Research, synthesis | Producing Md |
100 | Fm | Fermium | 255–257Fm | Research | Heavy actinide studies |
Z 101–110
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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101 | Md | Mendelevium | 258Md | Research | Nuclear chemistry |
102 | No | Nobelium | 259No | Research | Shell studies |
103 | Lr | Lawrencium | 266Lr | Research | Actinide closure |
104 | Rf | Rutherfordium | 261Rf | Research | Transactinide opener |
105 | Db | Dubnium | 262Db | Research | Nuclear structure |
106 | Sg | Seaborgium | 265–269Sg | Research | Heavy-ion synthesis |
107 | Bh | Bohrium | 267–271Bh | Research | Nuclear shell |
108 | Hs | Hassium | 269–271Hs | Research | Superheavy studies |
109 | Mt | Meitnerium | 276–278Mt | Research | Nuclear experiments |
110 | Ds | Darmstadtium | 279–281Ds | Research | Shell structure |
Z 111–118
Z | Symbol | Element | Key Isotopes | Immediate Role | Applications |
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111 | Rg | Roentgenium | 280–282Rg | Research | Symbolic codon |
112 | Cn | Copernicium | 283–285Cn | Research | Superheavy frontier |
113 | Nh | Nihonium | 278–284Nh | Research | Cultural codon |
114 | Fl | Flerovium | 287–289Fl | Research | Shell stability |
115 | Mc | Moscovium | 287–289Mc | Research | Geopolitical codon |
116 | Lv | Livermorium | 291–293Lv | Research | Institutional codon |
117 | Ts | Tennessine | 293–294Ts | Research | Regional codon |
118 | Og | Oganesson | 294Og | Research frontier | Heaviest 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