Element    Symbol       Atomic no. Z    Atomic Mass Actinium        Ac              89                      (227) Aluminum        Al              13                      26.98 Americium       Am              95                      (243) Antimony        Sb              51                      121.76 Argon           Ar              18                      39.944 Arsenic         As              33                      74.91  Astatine        At              84                      (210) Barium          Ba              56                      137.36 Berkelium       Bk              97                      (247) Beryllium       Be              4                      9.013 Bismuth         Bi              83                      (209) Boron           B               5                       10.82 Bromine         Br              35                      79.916 Cadmium         Cd              48                      112.41 Calcium         Ca              20                      40.08 Californium     Cf              98                      (251) Carbon          C               6                       12.011 Cerium          Ce              58                      140.13 Cesium          Cs              55                      132.91 Chlorine        Cl              17                      35.457 Chromium        Cr              24                      52.01 Cobalt          Co              27                      58.94 Copper          Cu              29                      63.54 Curium          Cm              96                      (247) Dysprosium      Dy              66                      162.51 Fermium         Fm              100                     (253) Fluorine        F               9                       19.00 Francium        Fr              87                      (223) Gadolinium      Gd              64                      157.26   Gallium         Ga              31                      69.72 Germanium       Ge              32                      72.60 Gold            Au              79                      197.0 Hafnium         Hf              72                      178.50 Helium          He              2                       4.003 Holmium         Ho              67                      164.94 Hydrogen        H               1                       1.0080 Indium          In              49                      114.82 Iodine          I               53                      126.91 Iridium         Ir              77                      192.2 Iron            Fe              26                      55.85 Krypton         Kr              36                      83.80 Lanthanum       La              57                      138.92 Lead            Pb              82                      207.21 Lithium         Li              3                       6.940 Lutetium        Lu              71                      174.99 Magnesium       Mg              12                      24.32 Manganese       Mn              25                      54.94 Mendelevium     Md              101                     (256) Mercury         Hg              80                      200.61 Molybdenum      Mo              42                      95.95 Neodymium       Nd              60                      144.27 Neon            Ne              10                      20.183 Neptunium       Np              93                      (237) Nickel          Ni              28                      58.71 Niobium NB              441                     92.91 Nitrogen        N               7                       14.008 Nobelium        No              102                     (253) Osmium          Os              76                      190.2 Oxygen          O               8                       16.0000 Palladium       Pd              46                      106.4 Phosphorus      P               15                      30.975 Platinum        Pt              78                      195.09 Plutonium       Pu              94                      (244) Polonium        Po              84                      (210) Potassium       K               19                      39.100 Praseodymium    Pr              59                      140.92 Promethium      Pm              61                      (145) Protactinium    Pa              91                      (213) Radium          Ra              88                      (226) Rhenium         Re              75                      186.22 Rhodium         Rh              45                      102.91 Rubidium        Rb              37                      85.48 Ruthenium       Ru              44                      101.10 Samarium        Sm              62                      150.35 Scandium        Sc              21                      44.96 Selenium        Se              34                      78.96 Silicon         Si              14                      28.09 Silver          Ag              47                      107.88 Sodium          Na              11                      22.991 Strontium       Sr              38                      87.63 Sulfur          S               16                      32.066 Tantalum        Ta              73                      180.95 Technetiuum     Tc              43                      (98) Tellurium       Te              52                      127.61 Terbium         Tb              65                      158.93 Thallium        Tl              81                      204.39 Thorium         Th              90                      (232) Thulium         Tm              69                      168.94 Tin             Sn              50                      118.70 Titanium        Ti              22                      47.90 Tungsten      W               74                      183.86 Uranium         U               92                      (238) Vanadium        V               23                      50.95 Xenon           Xe              54                      131.30 Ytterfium       Yb              70                      173.04 Yttrium         Y               39                      88.92 Zinc            Zn              30                      65.38 Zirconium       Zr              40                      91.22