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Periodic Table of Elements

Sorted by Year of Discovery

Note: This list only includes the 109 officially named elements. Also, there is some disagreement about the discovery year of some elements. Please see the element itself for additional discovery information, especially if you question our dates.

NameSym#Notes
Unknown  Antimony  Sb  51  Known to ancient civilization
Unknown  Bismuth  Bi  83  Known in the fifteenth century
Unknown  Carbon  C  6  Known to prehistoric humans
Unknown  Copper  Cu  29  Known to ancient civilization
Unknown  Gold  Au  79  Known to ancient civilization
Unknown  Iron  Fe  26  Known to ancient civilization
Unknown  Lead  Pb  82  Known to ancient civilization
Unknown  Mercury  Hg  80  Known to ancient civilization
Unknown  Platinum  Pt  78  Known to pre-Columbian South Americans. Taken to Europe around 1750
Unknown  Silver  Ag  47  Known to ancient civilization
Unknown  Sulfur  S  16  Known to ancient civilization
Unknown  Tin  Sn  50  Known to ancient civilization
Unknown  Zinc  Zn  30  Known in India and China before 1500
1250  Arsenic  As  33   
1669  Phosphorus  P  15   
1735  Cobalt  Co  27   
1751  Nickel  Ni  28   
1766  Hydrogen  H  1   
1772  Nitrogen  N  7   
1774  Chlorine  Cl  17   
1774  Manganese  Mn  25   
1774  Oxygen  O  8   
1781  Molybdenum  Mo  42   
1783  Tellurium  Te  52   
1783  Tungsten  W  74   
1789  Uranium  U  92   
1789  Zirconium  Zr  40   
1790  Strontium  Sr  38   
1791  Titanium  Ti  22   
1794  Yttrium  Y  39   
1797  Beryllium  Be  4   
1797  Chromium  Cr  24   
1801  Niobium  Nb  41   
1801  Vanadium  V  23   
1802  Tantalum  Ta  73   
1803  Cerium  Ce  58   
1803  Iridium  Ir  77   
1803  Osmium  Os  76   
1803  Palladium  Pd  46   
1803  Rhodium  Rh  45   
1807  Potassium  K  19   
1807  Sodium  Na  11   
1808  Barium  Ba  56   
1808  Boron  B  5   
1808  Calcium  Ca  20   
1808  Magnesium  Mg  12   
1808  Ruthenium  Ru  44   
1811  Iodine  I  53   
1817  Cadmium  Cd  48   
1817  Lithium  Li  3   
1817  Selenium  Se  34   
1824  Silicon  Si  14   
1825  Aluminum  Al  13   
1826  Bromine  Br  35   
1829  Thorium  Th  90   
1839  Lanthanum  La  57   
1842  Erbium  Er  68   
1843  Terbium  Tb  65   
1860  Cesium  Cs  55   
1861  Rubidium  Rb  37   
1861  Thallium  Tl  81   
1863  Indium  In  49   
1875  Gallium  Ga  31   
1878  Holmium  Ho  67   
1878  Ytterbium  Yb  70   
1879  Samarium  Sm  62   
1879  Scandium  Sc  21   
1879  Thulium  Tm  69   
1880  Gadolinium  Gd  64   
1885  Neodymium  Nd  60   
1885  Praseodymium  Pr  59   
1886  Dysprosium  Dy  66   
1886  Fluorine  F  9   
1886  Germanium  Ge  32   
1894  Argon  Ar  18   
1895  Helium  He  2   
1898  Krypton  Kr  36   
1898  Neon  Ne  10   
1898  Polonium  Po  84   
1898  Radium  Ra  88   
1898  Xenon  Xe  54   
1899  Actinium  Ac  89   
1900  Radon  Rn  86   
1901  Europium  Eu  63   
1907  Lutetium  Lu  71   
1913  Protactinium  Pa  91   
1923  Hafnium  Hf  72   
1925  Rhenium  Re  75   
1937  Technetium  Tc  43   
1939  Francium  Fr  87   
1940  Astatine  At  85   
1940  Neptunium  Np  93   
1940  Plutonium  Pu  94   
1944  Americium  Am  95   
1944  Curium  Cm  96   
1945  Promethium  Pm  61   
1949  Berkelium  Bk  97   
1950  Californium  Cf  98   
1952  Einsteinium  Es  99   
1952  Fermium  Fm  100   
1955  Mendelevium  Md  101   
1958  Nobelium  No  102   
1961  Lawrencium  Lr  103   
1969  Rutherfordium  Rf  104   
1970  Dubnium  Db  105   
1974  Seaborgium  Sg  106   
1975  Bohrium  Bh  107   
1982  Meitnerium  Mt  109   
1984  Hassium  Hs  108   
1994  Darmstadtium  Ds  110   
1994  Roentgenium  Rg  111   

[Last Update: 2/22/2007]

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Click here for main periodic table or move mouse to desired element.1 Hydrogen2 Helium3 Lithium4 Beryllium5 Boron6 Carbon7 Nitrogen8 Oxygen9 Fluorine10 Neon11 Sodium12 Magnesium13 Aluminum14 Silicon15 Phosphorus16 Sulfur17 Chlorine18 Argon19 Potassium20 Calcium21 Scandium22 Titanium23 Vandium24 Chromium25 Manganese26 Iron27 Cobalt28 Nickel29 Copper30 Zinc31 Gallium32 Germanium33 Arsenic34 Selenium35 Bromine36 Krypton37 Rubidium38 Strontium39 Yttrium40 Zirconium41 Niobium42 Molybdenum43 Technetium44 Ruthenium45 Rhodium46 Palladium47 Silver48 Cadmium49 Indium50 Tin51 Atimony52 Tellurium53 Iodine54 Xenon55 Cesium56 Barium57 Lathanum72 Hafnium73 Tantalum74 Tungsten75 Rhenium76 Osmium77 Iridium78 Platinum79 Gold80 Mercury81 Thallium82 Lead83 Bismuth84 Polonium85 Astatine86 Radon87 Francium88 Radium89 Actinium104 Rutherfordium105 Dubnium106 Seaborgium107 Bohrium108 Hassium109 Meitnerium110 Darmstadtium111 Roentgenium58 Cerium59 Praseodymium60 Neodymium61 Promethium62 Samarium63 Europium64 Gadolinium65 Terbium66 Dysprosium67 Holmium68 Erbium69 Thulium70 Ytterbium71 Lutetium90 Thorium91 Protactinum92 Uranium93 Neptunium94 Plutonium95 Americium96 Curium97 Berkelium98 Californium99 Einsteinium100 Fermium101 Mendelevium102 Nobelium103 Larencium
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