Elements & Compounds Used in XCOM, with Densities listed Elements At.# Sym. Density Hydrogen 001 H .0000899 g/cm^-3 Helium 002 He .0001785 g/cm^-3 Lithium 003 Li .534 g/cm^-3 Beryllium 004 Be 1.85 g/cm^-3 Boron 005 B 2.45 g/cm^-3 Carbon 006 C 2.25 g/cm^-3 Nitrogen 007 N .001250 g/cm^-3 Oxygen 008 O .001429 g/cm^-3 Flourine 009 F .001696 g/cm^-3 Neon 010 Ne .0008999 g/cm^-3 Sodium 011 Na .9712 g/cm^-3 Magnesium 012 Mg 1.74 g/cm^-3 Aluminum 013 Al 2.70 g/cm^-3 Silicon 014 Si 2.33 g/cm^-3 Phosphorous 015 P 1.83 g/cm^-3 Sulfur 016 S 2.07 g/cm^-3 Chlorine 017 Cl .003214 g/cm^-3 Argon 018 Ar .001784 g/cm^-3 Potassium 019 K .86 g/cm^-3 Calcium 020 Ca 1.55 g/cm^-3 Scandium 021 Sc 2.9 g/cm^-3 Titanium 022 Ti 4.51 g/cm^-3 Vanadium 023 V 6.11 g/cm^-3 Chromium 024 Cr 7.19 g/cm^-3 Manganese 025 Mn 7.43 g/cm^-3 Iron 026 Fe 7.87 g/cm^-3 Cobalt 027 Co 8.85 g/cm^-3 Nickel 028 Ni 8.9 g/cm^-3 Copper 029 Cu 9.86 g/cm^-3 Zinc 030 Zn 7.13 g/cm^-3 Gallium 031 Ga 5.91 g/cm^-3 Germanium 032 Ge 5.32 g/cm^-3 Arsenic 033 As 5.72 g/cm^-3 Selenium 034 Se 4.8 g/cm^-3 Bromine 035 Br 3.12 g/cm^-3 Krypton 036 Kr .003743 g/cm^-3 Rubidium 037 Rb 1.53 g/cm^-3 Strontium 038 Sr 2.60 g/cm^-3 Yttrium 039 Y 4.47 g/cm^-3 Zirconium 040 Zr 6.49 g/cm^-3 Niobium 041 Nb 8.57 g/cm^-3 Molybdenum 042 Mo 10.2 g/cm^-3 Technetium 043 Tc 11.5 g/cm^-3 Ruthenium 044 Ru 12.45 g/cm^-3 Rhodium 045 Rh 12.41 g/cm^-3 Palladium 046 Pd 12.02 g/cm^-3 Silver 047 Ag 10.49 g/cm^-3 Cadmium 048 Cd 8.65 g/cm^-3 Indium 049 In 7.31 g/cm^-3 Tin 050 Sn 7.30 g/cm^-3 Antimony 051 Sb 6.65 g/cm^-3 Tellurium 052 Te 6.24 g/cm^-3 Iodine 053 I 4.94 g/cm^-3 Xenon 054 Xe .005896 g/cm^-3 Cesium 055 Cs 1.87 g/cm^-3 Barium 056 Ba 3.6 g/cm^-3 Lanthanum 057 La 6.15 g/cm^-3 Cerium 058 Ce 6.77 g/cm^-3 Praseodymium 059 Pr 6.77 g/cm^-3 Neodymium 060 Nd 7.00 g/cm^-3 Promethium 061 Pm 0.0 g/cm^-3 Samarium 062 Sm 7.49 g/cm^-3 Europium 063 Eu 5.24 g/cm^-3 Gadolinium 064 Gd 7.86 g/cm^-3 Terbium 065 Tb 8.25 g/cm^-3 Dysprosium 066 Dy 8.55 g/cm^-3 Holmium 067 Ho 6.79 g/cm^-3 Erbium 068 Er 9.15 g/cm^-3 Thulium 069 Tm 9.31 g/cm^-3 Ytterbium 070 Yb 6.96 g/cm^-3 Lutetium 071 Lu 9.85 g/cm^-3 Hafnium 072 Hf 13.1 g/cm^-3 Tantalum 073 Ta 16.6 g/cm^-3 Tungsten 074 W 19.3 g/cm^-3 Rhenium 075 Re 21.0 g/cm^-3 Osmium 076 Os 22.61 g/cm^-3 Iridium 077 Ir 22.65 g/cm^-3 Platinum 078 Pt 21.45 g/cm^-3 Gold 079 Au 19.3 g/cm^-3 Mercury 080 Hg 13.55 g/cm^-3 Thallium 081 Tl 11.85 g/cm^-3 Lead 082 Pb 11.34 g/cm^-3 Bismuth 083 Bi 9.8 g/cm^-3 Polonium 084 Po 9.40 g/cm^-3 Astatine 085 At 0.0 g/cm^-3 Radon 086 Rn .009960 g/cm^-3 Francium 087 Fr 0.0 g/cm^-3 Radium 088 Ra 5.0 g/cm^-3 Actinium 089 Ac 0.0 g/cm^-3 Thorium 090 Th 11.5 g/cm^-3 Protoactinium 091 Pa 15.4 g/cm^-3 Uranium 092 U 19.07 g/cm^-3 Neptunium 093 Np 20.5 g/cm^-3 Plutonium 094 Pu 19.4 g/cm^-3 Americium 095 Am 11.87 g/cm^-3 Curium 096 Cm 7 g/cm^-3 Berkelium 097 Bk 0.0 g/cm^-3 Californium 098 Cf 0.0 g/cm^-3 Einsteinium 099 Es 0.0 g/cm^-3 Fermium 100 Fm 0.0 g/cm^-3 Compounds Common Name Density Bi4Ge3O12 BSO 7.13 g/cm^-3 CdTe Cadmium Telluride 6.2 g/cm^-3 CdZnTe Cadmium Zinc Telluride 6 g/cm^-3 CdSe Cadmium Selenide 5.81 g/cm^-3 CdZnSe Cadmium Zinc Selenide 5.5 g/cm^-3 HgI2 Silver Iodide 6.4 g/cm^-3 TlBrI Thallium Bromine Iodide 7.5 g/cm^-3 GaAs Gallium Astatate 5.32 g/cm^-3 InI Indium Iodide 5.31 g/cm^-3 GaSe Gallium Selenide 4.55 g/cm^-3 TlBr Thallium Bromide 7.56 g/cm^-3 PbI2 Lead Iodide 6.2 g/cm^-3 InP Indium Phosphate 4.78 g/cm^-3 ZnTe Zinc Telluride 5.72 g/cm^-3 HgBrI Silver Bromine Iodide 6.2 g/cm^-3 BP Boron Phosphate 2.9 g/cm^-3 GaP Gallium Phosphate 4.13 g/cm^-3 CdS Cadmium Sulfate 4.82 g/cm^-3 SiC Silicon Carbonate 3.2 g/cm^-3 AlSb Aluminum Antimode 4.26 g/cm^-3 PbO Lead Oxide 9.8 g/cm^-3 ZnSe Zinc Selenide 5.42 g/cm^-3 BaF2 Barium Floride 4.89 g/cm^-3 CdWO4 Cadmium Tungsten Oxide 7.90 g/cm^-3 CsI Cesium Iodide 4.53 g/cm^-3 NaI Sodium Iodide 3.67 g/cm^-3 YAlO3Ce YAlO 5.35 g/cm^-3 Gd2SiO5Ce GSO 6.70 g/cm^-3 H2O Water 1.0 g/cm^-3 Lu2SiO5Ce LSO 7.4 g/cm^-3