0   X Dummy 0.000000
  1   H Hydrogen 1.007900
  2  He Helium 4.002600
  3  Li Lithium 6.941000
  4  Be Beryllium 9.012180
  5   B Boron 10.810000
  6   C Carbon 12.011000
  7   N Nitrogen 14.006700
  8   O Oxygen 15.999400
  9   F Fluorine 18.998403
 10  Ne Neon 20.179000
 11  Na Sodium 22.989770
 12  Mg Magnesium 24.305000
 13  Al Aluminum 26.981540
 14  Si Silicon 28.085500
 15   P Phosphorus 30.973760
 16   S Sulfur 32.060000
 17  Cl Chlorine 35.453000
 18  Ar Argon 39.948000
 19   K Potassium 39.098300
 20  Ca Calcium 40.080000
 21  Sc Scandium 44.955900
 22  Ti Titanium 47.900000
 23   V Vanadium 50.941500
 24  Cr Chromium 51.996000
 25  Mn Manganese 54.938000
 26  Fe Iron 55.933200
 27  Co Cobalt 58.933200
 28  Ni Nickel 58.700000
 29  Cu Copper 63.546000
 30  Zn Zinc 65.380000
 31  Ga Gallium 69.720000
 32  Ge Germanium 72.590000
 33  As Arsenic 74.921600
 34  Se Selenium 78.960000
 35  Br Bromine 79.904000
 36  Kr Krypton 83.800000
 37  Rb Rubidium 85.467800
 38  Sr Strontium 87.620000
 39   Y Yttrium 88.905840
 40  Zr Zirconium 91.224000
 41  Nb Niobium 92.906370
 42  Mo Molybdenum 95.950000
 43  Tc Technetium 98.000000
 44  Ru Ruthenium 101.070000
 45  Rh Rhodium 102.905500
 46  Pd Palladium 106.420000
 47  Ag Silver 107.868200
 48  Cd Cadmium 112.414000
 49  In Indium 114.818000
 50  Sn Tin 118.710000
 51  Sb Antimony 121.760000
 52  Te Tellurium 127.600000
 53   I Iodine 126.904470
 54  Xe Xenon 131.293000
 78  Pt Platinum 195.084000