Density (ρ) is a substance's mass per unit volume, defined as ρ = m / V. Values here are measured at standard temperature and pressure (STP). Osmium and iridium are the densest known elements under standard conditions.
Data available for 96 of 118 elements. Highest: Osmium (22590 kg/m³). Lowest: Hydrogen (0.0899 kg/m³).
| Symbol | |||
|---|---|---|---|
| 76 | Osmium | Os | 22590 |
| 77 | Iridium | Ir | 22560 |
| 78 | Platinum | Pt | 21450 |
| 75 | Rhenium | Re | 21020 |
| 93 | Neptunium | Np | 20450 |
| 94 | Plutonium | Pu | 19820 |
| 79 | Gold | Au | 19300 |
| 74 | Tungsten | W | 19250 |
| 92 | Uranium | U | 19050 |
| 73 | Tantalum | Ta | 16650 |
| 91 | Protactinium | Pa | 15370 |
| 98 | Californium | Cf | 15100 |
| 97 | Berkelium | Bk | 14780 |
| 95 | Americium | Am | 13670 |
| 80 | Mercury | Hg | 13530 |
| 96 | Curium | Cm | 13510 |
| 72 | Hafnium | Hf | 13310 |
| 45 | Rhodium | Rh | 12450 |
| 44 | Ruthenium | Ru | 12370 |
| 46 | Palladium | Pd | 12020 |
| 81 | Thallium | Tl | 11850 |
| 90 | Thorium | Th | 11720 |
| 43 | Technetium | Tc | 11500 |
| 82 | Lead | Pb | 11340 |
| 47 | Silver | Ag | 10490 |
| 42 | Molybdenum | Mo | 10280 |
| 89 | Actinium | Ac | 10070 |
| 71 | Lutetium | Lu | 9841 |
| 83 | Bismuth | Bi | 9780 |
| 69 | Thulium | Tm | 9320 |
| 84 | Polonium | Po | 9196 |
| 68 | Erbium | Er | 9066 |
| 29 | Copper | Cu | 8960 |
| 28 | Nickel | Ni | 8908 |
| 27 | Cobalt | Co | 8900 |
| 67 | Holmium | Ho | 8795 |
| 48 | Cadmium | Cd | 8650 |
| 41 | Niobium | Nb | 8570 |
| 66 | Dysprosium | Dy | 8551 |
| 65 | Terbium | Tb | 8219 |
| 64 | Gadolinium | Gd | 7901 |
| 26 | Iron | Fe | 7874 |
| 25 | Manganese | Mn | 7470 |
| 62 | Samarium | Sm | 7353 |
| 49 | Indium | In | 7310 |
| 50 | Tin | Sn | 7310 |
| 61 | Promethium | Pm | 7264 |
| 24 | Chromium | Cr | 7190 |
| 30 | Zinc | Zn | 7140 |
| 60 | Neodymium | Nd | 7010 |
| 51 | Antimony | Sb | 6697 |
| 58 | Cerium | Ce | 6689 |
| 59 | Praseodymium | Pr | 6640 |
| 70 | Ytterbium | Yb | 6570 |
| 40 | Zirconium | Zr | 6511 |
| 52 | Tellurium | Te | 6240 |
| 57 | Lanthanum | La | 6146 |
| 23 | Vanadium | V | 6110 |
| 31 | Gallium | Ga | 5904 |
| 33 | Arsenic | As | 5727 |
| 32 | Germanium | Ge | 5323 |
| 63 | Europium | Eu | 5244 |
| 88 | Radium | Ra | 5000 |
| 53 | Iodine | I | 4940 |
| 34 | Selenium | Se | 4819 |
| 22 | Titanium | Ti | 4507 |
| 39 | Yttrium | Y | 4472 |
| 56 | Barium | Ba | 3510 |
| 35 | Bromine | Br | 3120 |
| 21 | Scandium | Sc | 2985 |
| 13 | Aluminum | Al | 2700 |
| 38 | Strontium | Sr | 2630 |
| 5 | Boron | B | 2460 |
| 14 | Silicon | Si | 2330 |
| 6 | Carbon | C | 2260 |
| 16 | Sulfur | S | 1960 |
| 55 | Cesium | Cs | 1879 |
| 4 | Beryllium | Be | 1848 |
| 15 | Phosphorus | P | 1823 |
| 12 | Magnesium | Mg | 1738 |
| 20 | Calcium | Ca | 1550 |
| 37 | Rubidium | Rb | 1532 |
| 11 | Sodium | Na | 968 |
| 19 | Potassium | K | 856 |
| 3 | Lithium | Li | 535 |
| 86 | Radon | Rn | 9.73 |
| 54 | Xenon | Xe | 5.9 |
| 36 | Krypton | Kr | 3.75 |
| 17 | Chlorine | Cl | 3.214 |
| 18 | Argon | Ar | 1.784 |
| 9 | Fluorine | F | 1.696 |
| 8 | Oxygen | O | 1.429 |
| 7 | Nitrogen | N | 1.251 |
| 10 | Neon | Ne | 0.9 |
| 2 | Helium | He | 0.1785 |
| 1 | Hydrogen | H | 0.0899 |
| 85 | Astatine | At | — |
| 87 | Francium | Fr | — |
| 99 | Einsteinium | Es | — |
| 100 | Fermium | Fm | — |
| 101 | Mendelevium | Md | — |
| 102 | Nobelium | No | — |
| 103 | Lawrencium | Lr | — |
| 104 | Rutherfordium | Rf | — |
| 105 | Dubnium | Db | — |
| 106 | Seaborgium | Sg | — |
| 107 | Bohrium | Bh | — |
| 108 | Hassium | Hs | — |
| 109 | Meitnerium | Mt | — |
| 110 | Darmstadtium | Ds | — |
| 111 | Roentgenium | Rg | — |
| 112 | Copernicium | Cn | — |
| 113 | Nihonium | Nh | — |
| 114 | Flerovium | Fl | — |
| 115 | Moscovium | Mc | — |
| 116 | Livermorium | Lv | — |
| 117 | Tennessine | Ts | — |
| 118 | Oganesson | Og | — |