EN ▾

The World of Matter in Your Hands

Everything around you is made of atoms of fewer than a hundred naturally occurring elements. We know 118 - Nuclidea lets you explore every one of them: from the periodic table, through the nuclear data of over 3,000 isotopes, to an interactive simulation of radioactive decay.

Periodic Table of ElementsBrowse all known elements arranged by chemical properties. Click any one to see its data, isotopes, and atomic structure.Chart of NuclidesAll nuclides on a map of proton and neutron numbers, colored by decay mode. Zoom, pan, and click a tile to open the isotope page.List of Isotopes and IsomersAll known isotopes and isomers in one list - sort by half-life, search, filter stable or radioactive ones. Each leads to a page with nuclear data and its decay chain.Radioactive Decay SimulatorChoose a radioactive isotope and watch its decay on an adjustable time scale. Track the products of nuclear transmutation and explore the complete decay series.

Data: NNDC Wallet Cards 2023 · PubChem · IUPAC CIAAW 2024 · NIST ASD - Sources and licences

Periodic Table

  1. 1HHydrogen1.0080
  2. 2HeHelium4.0026
  3. 3LiLithium6.94
  4. 4BeBeryllium9.0122
  5. 5BBoron10.81
  6. 6CCarbon12.011
  7. 7NNitrogen14.007
  8. 8OOxygen15.999
  9. 9FFluorine18.998
  10. 10NeNeon20.180
  11. 11NaSodium22.990
  12. 12MgMagnesium24.305
  13. 13AlAluminium26.982
  14. 14SiSilicon28.085
  15. 15PPhosphorus30.974
  16. 16SSulfur32.06
  17. 17ClChlorine35.45
  18. 18ArArgon39.95
  19. 19KPotassium39.098
  20. 20CaCalcium40.078
  21. 21ScScandium44.956
  22. 22TiTitanium47.867
  23. 23VVanadium50.942
  24. 24CrChromium51.996
  25. 25MnManganese54.938
  26. 26FeIron55.845
  27. 27CoCobalt58.933
  28. 28NiNickel58.693
  29. 29CuCopper63.546
  30. 30ZnZinc65.38
  31. 31GaGallium69.723
  32. 32GeGermanium72.630
  33. 33AsArsenic74.922
  34. 34SeSelenium78.971
  35. 35BrBromine79.904
  36. 36KrKrypton83.798
  37. 37RbRubidium85.468
  38. 38SrStrontium87.62
  39. 39YYttrium88.906
  40. 40ZrZirconium91.222
  41. 41NbNiobium92.906
  42. 42MoMolybdenum95.95
  43. 43TcTechnetium[97]
  44. 44RuRuthenium101.07
  45. 45RhRhodium102.91
  46. 46PdPalladium106.42
  47. 47AgSilver107.87
  48. 48CdCadmium112.41
  49. 49InIndium114.82
  50. 50SnTin118.71
  51. 51SbAntimony121.76
  52. 52TeTellurium127.60
  53. 53IIodine126.90
  54. 54XeXenon131.29
  55. 55CsCesium132.91
  56. 56BaBarium137.33
  57. 57LaLanthanum138.91
  58. 58CeCerium140.12
  59. 59PrPraseodymium140.91
  60. 60NdNeodymium144.24
  61. 61PmPromethium[145]
  62. 62SmSamarium150.36
  63. 63EuEuropium151.96
  64. 64GdGadolinium157.25
  65. 65TbTerbium158.93
  66. 66DyDysprosium162.50
  67. 67HoHolmium164.93
  68. 68ErErbium167.26
  69. 69TmThulium168.93
  70. 70YbYtterbium173.05
  71. 71LuLutetium174.97
  72. 72HfHafnium178.49
  73. 73TaTantalum180.95
  74. 74WTungsten183.84
  75. 75ReRhenium186.21
  76. 76OsOsmium190.23
  77. 77IrIridium192.22
  78. 78PtPlatinum195.08
  79. 79AuGold196.97
  80. 80HgMercury200.59
  81. 81TlThallium204.38
  82. 82PbLead207.2
  83. 83BiBismuth208.98
  84. 84PoPolonium[209]
  85. 85AtAstatine[210]
  86. 86RnRadon[222]
  87. 87FrFrancium[223]
  88. 88RaRadium[226]
  89. 89AcActinium[227]
  90. 90ThThorium232.04
  91. 91PaProtactinium231.04
  92. 92UUranium238.03
  93. 93NpNeptunium[237]
  94. 94PuPlutonium[244]
  95. 95AmAmericium[243]
  96. 96CmCurium[247]
  97. 97BkBerkelium[247]
  98. 98CfCalifornium[251]
  99. 99EsEinsteinium[252]
  100. 100FmFermium[257]
  101. 101MdMendelevium[258]
  102. 102NoNobelium[259]
  103. 103LrLawrencium[266]
  104. 104RfRutherfordium[267]
  105. 105DbDubnium[268]
  106. 106SgSeaborgium[269]
  107. 107BhBohrium[278]
  108. 108HsHassium[269]
  109. 109MtMeitnerium[278]
  110. 110DsDarmstadtium[282]
  111. 111RgRoentgenium[282]
  112. 112CnCopernicium[286]
  113. 113NhNihonium[286]
  114. 114FlFlerovium[290]
  115. 115McMoscovium[290]
  116. 116LvLivermorium[293]
  117. 117TsTennessine[294]
  118. 118OgOganesson[294]