Chemical symbol Name Origin of symbol No. Atomic mass Density at 20C Melting point C Boiling point C Year of discovery Discoverer
Ac Actinium   89 227,0278 g/mol 10,07 g/cm3 1047 C 3197 C 1899 Debierne
Ag Silver Latin Argentum 47 107,8682 g/mol 10,49 g/cm3 961,9 C 2212 C prehistoric unknown
Al Aluminium   13 26,981539 g/mol 2,70 g/cm3 660,5 C 2467 C 1825 Oersted
Am Americium   95 243,0614 g/mol 13,67 g/cm3 994 C 2607 C 1944 Seaborg
Ar Argon   18 39,948 g/mol 1,66 g/l -189,4 C -185,9 C 1894 Ramsay and Rayleigh
As Arsenic   33 74,92159 g/mol 5,72 g/cm3 613 C 613 (Subl.) C ca. 1250 Albertus Magnus
At Astatine   85 209,9871 g/mol   302 C 337 C 1940 Corson and MacKenzie
Au Gold Latin Aurum 79 196,96654 g/mol 19,32 g/cm3 1064,4 C 2940 C prehistoric unknown
B Boron   5 10,811 g/mol 2,46 g/cm3 2300 C 2550 C 1808 Davy and Gay-Lussac
Ba Barium   56 137,327 g/mol 3,65 g/cm3 725 C 1640 C 1808 Davy
Be Beryllium   4 9,012182 g/mol 1,85 g/cm3 1278 C 2970 C 1797 Vauquelin
Bh Bohrium   107 262,1229 g/mol       1976 Oganessian
Bi Bismuth   83 208,98037 g/mol 9,80 g/cm3 271,4 C 1560 C 1540 Agricola
Bk Berkelium   97 247,0703 g/mol 13,25 g/cm3 986 C   1949 Seaborg
Br Bromine   35 79,904 g/mol 3,14 g/cm3 -7,3 C 58,8 C 1826 Balard
C Carbon   6 12,011 g/mol 3,51 g/cm3 3550 C 4827 C prehistoric unknown
Ca Calcium   20 40,078 g/mol 1,54 g/cm3 839 C 1487 C 1808 Davy
Cd Cadmium   48 112,411 g/mol 8,64 g/cm3 321 C 765 C 1817 Stromeyer and Hermann
Ce Cerium   58 140,115 g/mol 6,77 g/cm3 798 C 3257 C 1803 von Hisinger and Berzelius
Cf Californium   98 251,0796 g/mol 15,1 g/cm3 900 C   1950 Seaborg
Cl Chlorine   17 35,4527 g/mol 2,95 g/l -34,6 C -101 C 1774 Scheele
Cm Curium   96 247,0703 g/mol 13,51 g/cm3 1340 C   1944 Seaborg
Co Cobalt   27 58,9332 g/mol 8,89 g/cm3 1495 C 2870 C 1735 Brandt
Cr Chromium   24 51,9961 g/mol 7,14 g/cm3 1857 C 2482 C 1797 Vauquelin
Cs Caesium   55 132,90543 g/mol 1,90 g/cm3 28,4 C 690 C 1860 Kirchhoff and Bunsen
Cu Copper Latin Cuprum 29 63,546 g/mol 8,92 g/cm3 1083,5 C 2595 C prehistoric unknown
Db Dubnium   105 262,1138 g/mol       1967/70 Flerow oder Ghiorso
Ds Darmstadtium   110 269 g/mol       1994 Society for Heavy Ion Research
Dy Dysprosium   66 162,5 g/mol 8,56 g/cm3 1409 C 2335 C 1886 Lecoq de Boisbaudran
Er Erbium   68 167,26 g/mol 9,05 g/cm3 1522 C 2510 C 1842 Mosander
Es Einsteinium   99 252,0829 g/mol   860 C   1952 Seaborg
Eu Europium   63 151,965 g/mol 5,25 g/cm3 822 C 1597 C 1901 Demaay
F Fluorine   9 18,9984032 g/mol 1,58 g/l -219,6 C -188,1 C 1886 Moissan
Fe Iron Latin Ferrum 26 55,847 g/mol 7,87 g/cm3 1535 C 2750 C prehistoric unknown
Fm Fermium   100 257,0951 g/mol       1952 Seaborg
Fr Francium   87 223,0197 g/mol   27 C 677 C 1939 Perey
Ga Gallium   31 69,723 g/mol 5,91 g/cm3 29,8 C 2403 C 1875 Lecoq de Boiskaudran
Gd Gadolinium   64 157,25 g/mol 7,89 g/cm3 1311 C 3233 C 1880 de Marignac
Ge Germanium   32 72,61 g/mol 5,32 g/cm3 937,4 C 2830 C 1886 Winkler
H Hydrogen   1 1,00794 g/mol 0,084 g/l -259,1 C -252,9 C 1766 Cavendish
He Helium   2 4,002602 g/mol 0,17 g/l -272,2 C -268,9 C 1895 Ramsay and Cleve
Hf Hafnium   72 178,49 g/mol 13,31 g/cm3 2150 C 5400 C 1923 Coster and vn Hevesy
Hg Mercury Latin Hydragyrum 80 200,59 g/mol 13,55 g/cm3 -38,9 C 356,6 C prehistoric unknown
Ho Holmium   67 164,93032 g/mol 8,78 g/cm3 1470 C 2720 C 1878 Soret
Hs Hassium   108 265 g/mol       1984 Society for Heavy Ion Research
I Iodine   53 126,90447 g/mol 4,94 g/cm3 113,5 C 184,4 C 1811 Courtois
In Indium   49 114,82 g/mol 7,31 g/cm3 156,2 C 2080 C 1863 Reich and Richter
Ir Iridium   77 192,22 g/mol 22,65 g/cm3 2410 C 4130 C 1803 Tenant and andere
K Potassium German Kalium 19 39,0983 g/mol 0,86 g/cm3 63,7 C 774 C 1807 Davy
Kr Krypton   36 83,8 g/mol 3,48 g/l -156,6 C -152,3 C 1898 Ramsay and Travers
La Lanthanum   57 138,9055 g/mol 6,16 g/cm3 920 C 3454 C 1839 Mosander
Li Lithium   3 6,941 g/mol 0,53 g/cm3 180,5 C 1317 C 1817 Arfvedson
Lr Lawrencium   103 260,1053 g/mol       1961 Ghiorso
Lu Lutetium   71 174,967 g/mol 9,84 g/cm3 1656 C 3315 C 1907 Urbain
Md Mendelevium   101 258,0986 g/mol       1955 Seaborg
Mg Magnesium   12 24,305 g/mol 1,74 g/cm3 648,8 C 1107 C 1755 Black
Mn Manganese   25 54,93805 g/mol 7,44 g/cm3 1244 C 2097 C 1774 Gahn
Mo Molybdenum   42 95,94 g/mol 10,28 g/cm3 2617 C 5560 C 1778 Scheele
Mt Meitnerium   109 266 g/mol       1982 Society for Heavy Ion Research
N Nitrogen   7 14,00674 g/mol 1,17 g/l -209,9 C -195,8 C 1772 Rutherford
Na Sodium Latin Natrium 11 22,989768 g/mol 0,97 g/cm3 97,8 C 892 C 1807 Davy
Nb Niobium   41 92,90638 g/mol 8,58 g/cm3 2468 C 4927 C 1801 Hatchet
Nd Neodymium   60 144,24 g/mol 7,00 g/cm3 1010 C 3127 C 1895 von Welsbach
Ne Neon   10 20,1797 g/mol 0,84 g/l -248,7 C -246,1 C 1898 Ramsay and Travers
Ni Nickel   28 58,69 g/mol 8,91 g/cm3 1453 C 2732 C 1751 Cronstedt
No Nobelium   102 259,1009 g/mol       1958 Seaborg
Np Neptunium   93 237,0482 g/mol 20,48 g/cm3 640 C 3902 C 1940 McMillan and Abelson
O Oxygen   8 15,9994 g/mol 1,33 g/l -218,4 C -182,9 C 1774 Priestley and Scheele
Os Osmium   76 190,2 g/mol 22,61 g/cm3 3045 C 5027 C 1803 Tenant
P Phosphorus   15 30,973762 g/mol 1,82 g/cm3 44 (P4) C 280 (P4) C 1669 Brandt
Pa Protactinium   91 231,0359 g/mol 15,37 g/cm3 1554 C 4030 C 1917 Soddy, Cranston and Hahn
Pb Lead Latin Plumbum 82 207,2 g/mol 11,34 g/cm3 327,5 C 1740 C prehistoric unknown
Pd Palladium   46 106,42 g/mol 12,02 g/cm3 1552 C 3140 C 1803 Wollaston
Pm Promethium   61 146,9151 g/mol 7,22 g/cm3 1080 C 2730 C 1945 Marinsky and Glendenin
Po Polonium   84 208,9824 g/mol 9,20 g/cm3 254 C 962 C 1898 Marie and Pierre Curie
Pr Praseodymium   59 140,90765 g/mol 6,48 g/cm3 931 C 3212 C 1895 von Welsbach
Pt Platinum   78 195,08 g/mol 21,45 g/cm3 1772 C 3827 C 1557 Scaliger
Pu Plutonium   94 244,0642 g/mol 19,74 g/cm3 641 C 3327 C 1940 Seaborg
Ra Radium   88 226,0254 g/mol 5,50 g/cm3 700 C 1140 C 1898 Marie and Pierre Curie
Rb Rubidium   37 85,4678 g/mol 1,53 g/cm3 39 C 688 C 1861 Bunsen and Kirchhoff
Re Rhenium   75 186,207 g/mol 21,03 g/cm3 3180 C 5627 C 1925 Noddack, Tacke and Berg
Rf Rutherfordium   104 261,1087 g/mol       1964/69 Flerow oder Ghiorso
Rg Roentgenium   111 272 g/mol       1994 Society for Heavy Ion Research
Rh Rhodium   45 102,9055 g/mol 12,41 g/cm3 1966 C 3727 C 1803 Wollaston
Rn Radon   86 222,0176 g/mol 9,23 g/l -71 C -61,8 C 1900 Dorn
Ru Ruthenium   44 101,07 g/mol 12,45 g/cm3 2310 C 3900 C 1844 Claus
S Sulphur   16 32,066 g/mol 2,06 g/cm3 113 C 444,7 C prehistoric unknown
Sb Antimony Latin Stibium 51 121,75 g/mol 6,69 g/cm3 630,7 C 1750 C prehistoric unknown
Sc Scandium   21 44,95591 g/mol 2,99 g/cm3 1539 C 2832 C 1879 Nilson
Se Selenium   34 78,96 g/mol 4,82 g/cm3 217 C 685 C 1817 Berzelius
Sg Seaborgium   106 263,1182 g/mol       1974 Oganessian
Si Silicon   14 28,0855 g/mol 2,33 g/cm3 1410 C 2355 C 1824 Berzelius
Sm Samarium   62 150,36 g/mol 7,54 g/cm3 1072 C 1778 C 1879 Lecoq de Boisbaudran
Sn Tin Latin Stannum 50 118,71 g/mol 7,29 g/cm3 232 C 2270 C prehistoric unknown
Sr Strontium   38 87,62 g/mol 2,63 g/cm3 769 C 1384 C 1790 Crawford
Ta Tantalum   73 180,9479 g/mol 16,68 g/cm3 2996 C 5425 C 1802 Ekeberg
Tb Terbium   65 158,92534 g/mol 8,25 g/cm3 1360 C 3041 C 1843 Mosander
Tc Technetium   43 98,9063 g/mol 11,49 g/cm3 2172 C 5030 C 1937 Perrier and Segr
Te Tellurium   52 127,6 g/mol 6,25 g/cm3 449,6 C 990 C 1782 von Reichenstein
Th Thorium   90 232,0381 g/mol 11,72 g/cm3 1750 C 4787 C 1829 Berzelius
Ti Titanium   22 47,88 g/mol 4,51 g/cm3 1660 C 3260 C 1791 Gregor and Klaproth
Tl Thallium   81 204,3833 g/mol 11,85 g/cm3 303,6 C 1457 C 1861 Crookes
Tm Thulium   69 168,93421 g/mol 9,32 g/cm3 1545 C 1727 C 1879 Cleve
U Uranium   92 238,0289 g/mol 18,97 g/cm3 1132,4 C 3818 C 1789 Klaproth
Uub Ununbium   112 277 g/mol       1996 Society for Heavy Ion Research
Uuh Ununhexium   116            
Uuo Ununoctium   118            
Uup Ununpentium   115            
Uug Ununquadium   114            
Uus Ununseptium   117            
Uut Ununtrium   113            
V Vanadium   23 50,9415 g/mol 6,09 g/cm3 1890 C 3380 C 1801 del Rio
W Tungsten German Wolfram 74 183,85 g/mol 19,26 g/cm3 3407 C 5927 C 1783 Gebrder de Elhuyar
Xe Xenon   54 131,29 g/mol 4,49 g/l -111,9 C -107 C 1898 Ramsay and Travers
Y Yttrium   39 88,90585 g/mol 4,47 g/cm3 1523 C 3337 C 1794 Gadolin
Yb Ytterbium   70 173,04 g/mol 6,97 g/cm3 824 C 1193 C 1878 de Marignac
Zn Zinc   30 65,39 g/mol 7,14 g/cm3 419,6 C 907 C prehistoric unknown
Zr Zirconium   40 91,224 g/mol 6,51 g/cm3 1852 C 4377 C 1789 Klaproth
Source : http://simple.wikipedia.org/wiki/List_of_elements_by_symbol