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Table of Chemical Elements

Name           Symbol   Atomic      Atomic    Discoverer               Country      Date
                        number      weight

Actinium        Ac          89     227.028    Andre Debierne           France       1899
Aluminum        Al          13     26.9815    Hans Christian Oersted   Denmark      1825
Americium       Am          95       [243]    G. T. Seaborg; R. A.     United       1945
                                              James; L. O. Morgan;     States
                                              A. Ghiorso
Antimony        Sb          51      121.75    Unknown; name applied
                                              to pure element in
                                              France in 1787
Argon           Ar          18      39.948    Sir William Ramsay;      Britain      1894
                                              Baron Rayleigh
Arsenic         As          33     74.9216    Uncertain; often
                                              credited to Albertus
                                              Magnus in Germany
                                              about 1250
Astatine        At          85       [210]    D. R. Corson; K. R.      United       1940
                                              MacKenzie; E. Segre      States
Barium          Ba          56      137.33    Sir Humphry Davy         Britain      1808
Berkelium       Bk          97       [247]    G. T. Seaborg; S. G.     United       1949
                                              Thompson; A. Ghiorso     States
Beryllium       Be           4      9.0128    Friedrich Wohler; A.     Germany;     1828
                                              A. Bussy                 France
Bismuth         Bi          83     208.980    Unknown; preparation
                                              described in Germany
                                              in 1556
Boron           B            5       10.81    H. Davy; J. L. Gay-      Britain;     1808
                                              Lussac; L. J.            France
                                              Thenard
Bromine         Br          35      79.904    Antoine J. Balard;       France;      1826
                                              Carl J. Lowig            Germany
Cadmium         Cd          48      112.41    Friedrich Stromeyer      Germany      1817
Calcium         Ca          20       40.08    Sir Humphry Davy         Britain      1808
Californium     Cf          98       [251]    G. T. Seaborg; S. G.     United       1950
                                              Thompson; A.             States
                                              Ghiorso; K. Street, Jr
Carbon          C            6      12.011    Known to ancients
Cerium          Ce          58      140.12    W. von Hisinger; J.      Sweden;      1803
                                              Berzelius; M.            Germany
                                              Klaproth
Cesium          Cs          55     132.905    Gustav Kirchhoff,        Germany      1860
                                              Robert Bunsen
Chlorine        Cl          17      35.453    Carl Wilhelm Scheele     Sweden       1774
Chromium        Cr          24      51.996    Louis Vauquelin          France       1797
Cobalt          Co          27     58.9332    Georg Brandt             Sweden       Late 1730s
Copper          Cu          29      63.546    Known to ancients
Curium          Cm          96       [247]    G. T. Seaborg; R. A.     United       1944
                                              James; A. Ghiorso        States
Dysprosium      Dy          66      162.50    Paul Emile Lecoq de      France       1886
                                              Boisbaudran
Einsteinium     Es          99       [252]    Argonne; Los Alamos;     United       1952
                                              Berkeley                 States
Element 104     none       104       [261]    Joint Institute for      Russia       1969-1970
                                              Nuclear Research
                                              Lawrence Berkeley        United
                                              Laboratory               States
Element 105     none       105       [263]    Joint Institute for      Russia       1970-1971
                                              Nuclear Research
                                              Lawrence Berkeley        United
                                              Laboratory               States
Element 106     none       106       [266]    Lawrence Berkeley        United       1974
                                              Laboratory               States
                                              Lawrence Livermore       United       1974
                                              National Laboratory      States
Element 107     none       107       [264]    Heavy Ion Research       Germany      1981
                                              Center
Element 108     none       108       [267]    Heavy Ion Research       Germany      1984
                                              Center
Element 109     none       109       [268]    Heavy Ion Research       Germany      1982
                                              Center
Erbium          Er          68      167.26    Carl Mosander            Sweden       1843
Europium        Eu          63      151.96    Eugene Demarcay          France       1901
Fermium         Fm         100       [257]    Argonne; Los Alamos;     United       1953
                                              Univerity of             States
                                              California
Fluorine        F            9     18.9984    Henri Moissan            France       1886
Francium        Fr          87       [223]    Marguerite Perey         France       1939
Gadolinium      Gd          64      157.25    Jean de Marignac         Switzerland  1880
Gallium         Ga          31       69.72    Paul Emile Lecoq de      France       1875
                                              Boisbaudran
Germanium       Ge          32       72.59    Clemens Winkler          Germany      1886
Gold            Au          79     196.967    Known to ancients
Hafnium         Hf          72      178.49    Dirk Coster; Georg von   Denmark      1923
                                              Hevesy
Helium          He           2     4.00260    Sir William Ramsay;      Britain;     1895
                                              Nils Langlet; P. T.      Sweden
                                              Cleve
Holmium         Ho          67     164.930    J. L. Soret              Switzerland  1878
Hydrogen        H            1      1.0079    Henry Cavendish          Britain      1766
Indium          In          49      114.82    Ferdinand Reich; H.      Germany      1863
                                              Richter
Iodine          I           53     126.905    Bernard Courtois         France       1811
Iridium         Ir          77      192.22    Smithson Tennant         Britain      1804
Iron            Fe          26      55.847    Known to ancients
Krypton         Kr          36       83.80    Sir William Ramsay; M.   Britain      1898
                                              W. Travers
Lanthanum       La          57     138.906    Carl Mosander            Sweden       1839
Lawrencium      Lr         103         262    Joint Institute for      Russia       1961
                                              Nuclear Research
                                              Lawrence Berkeley        United
                                              Laboratory               States
Lead            Pb          82       207.2    Known to ancients
Lithium         Li           3       6.941    Johann Arfvedson         Sweden       1817
Lutetium        Lu          71     174.967    Georges Urbain           France       1907
Magnesium       Mg          12      24.305    Sir Humphry Davy         Britain      1808
Manganese       Mn          25     54.9380    Johan Gahn               Sweden       1774
Mendelevium     Md         101       [258]    Lawrence Berkeley        United       1958
                                              Laboratory               States
Mercury         Hg          80      200.59    Known to ancients
Molybdenum      Mo          42       95.94    Carl Wilhelm Scheele     Sweden       1778
Neodymium       Nd          60      144.24    C. F. Auer von           Austria      1885
                                              Welsbach
Neon            Ne          10      20.179    Sir William Ramsay; M.   Britain      1898
                                              W. Travers
Neptunium       Np          93     237.048    E. M. McMillan; P. H.    United       1940
                                              Abelson                  States
Nickel          Ni          28       58.69    Axel Cronstedt           Sweden       1751
Niobium         Nb          41     92.9064    Charles Hatchett         Britain      1801
Nitrogen        N            7     14.0067    Daniel Rutherford        Britain      1772
Nobelium        No         102       [259]    Joint Institute for      Russia       1966
                                              Nuclear Research
Osmium          Os          76       190.2    Smithson Tennant         Britain      1804
Oxygen          O            8     15.9994    Joseph Priestley; Carl   Britain;     1774
                                              Wilhelm Scheele          Sweden
Palladium       Pd          46      106.42    William Wollaston        Britain      1803
Phosphorus      P           15     30.9738    Hennig Brand             Germany      1669
Platinum        Pt          78      195.08    Julius Scaliger          Italy        1557
Plutonium       Pu          94       [244]    G. T. Seaborg; J. W.     United       1940
                                              Kennedy; E. M.           States
                                              McMillan; A. C. Wahl
Polonium        Po          84       [209]    Pierre and Marie Curie   France       1898
Potassium       K           19     39.0983    Sir Humphry Davy         Britain      1807
Praseodymium    Pr          59     140.908    C. F. Auer von           Austria      1885
                                              Welsbach
Promethium      Pm          61       [145]    J. A. Marinsky;          United       1945
                                              Lawrence E.              States
                                              Glendenin; Charles
                                              D. Coryell
Protactinium    Pa          91     231.036    Otto Hahn; Lise          Germany;     1917
                                              Meitner; Frederick       Britain
                                              Soddy; John Cranston
Radium          Ra          88     226.025    Pierre and Marie Curie   France       1898
Radon           Rn          86       [222]    Friedrich Ernst Dorn     Germany      1900
Rhenium         Re          75     186.207    Walter Noddack; Ida      Germany      1925
                                              Tacke; Otto Berg
Rhodium         Rh          45     102.906    William Wollaston        Britain      1803
Rubidium        Rb          37     85.4678    R. Bunsen; G.            Germany      1861
                                              Kirchhoff
Ruthenium       Ru          44      101.07    Karl Klaus               Russia       1844
Samarium        Sm          62      150.36    Paul Emile Lecoq de      France       1879
                                              Boisbaudran
Scandium        Sc          21     44.9559    Lars Nilson              Sweden       1879
Selenium        Se          34       78.96    Jons Berzelius           Sweden       1817
Silicon         Si          14     28.0855    Jons Berzelius           Sweden       1823
Silver          Ag          47     107.868    Known to ancients
Sodium          Na          11     22.9898    Sir Humphry Davy         Britain      1807
Strontium       Sr          38       87.62    A. Crawford              Britain      1790
Sulphur         S           16       32.06    Known to ancients
Tantalum        Ta          73     180.948    Anders Ekeberg           Sweden       1802
Technetium      Tc          43        [98]    Carlo Perrier; Emilio    Italy        1937
                                              Segre
Tellurium       Te          52      127.60    Franz Muller von         Romania      1782
                                              Reichenstein
Terbium         Tb          65     158.925    Carl Mosander            Sweden       1843
Thallium        Tl          81     204.383    Sir William Crookes      Britain      1861
Thorium         Th          90     232.038    Jons Berzelius           Sweden       1828
Thulium         Tm          69     168.934    Per Theodor Cleve        Sweden       1879
Tin             Sn          50      118.71    Known to ancients
Titanium        Ti          22       47.88    William Gregor           Britain      1791
Tungsten        W           74      183.85    Fausto and Juan Jose     Spain        1783
                                              de Elhuyar
Uranium         U           92     238.029    Martin Klaproth          Germany      1789
Vanadium        V           23     50.9415    Nils Sefstrom            Sweden       1830
Xenon           Xe          54      131.29    Sir William Ramsay; M.   Britain      1898
                                              W. Travers
Ytterbium       Yb          70      173.04    Jean de Marignac         Switzerland  1878
Yttrium         Y           39     88.9059    Johann Gadolin           Finland      1794
Zinc            Zn          30       65.39    Andreas Marggraf         Germany      1746
Zirconium       Zr          40      91.224    Martin Klaproth          Germany      1789

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