Density
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Density is the ratio of a substance's mass to its volume. The symbol most often used for density is ρ, although the Latin letter D can also be used: ρ = m V, where ρ is the density, m is the mass, and
A test tube holding four non-miscible colored liquids with different densities
One-troy-ounce (480 gr; 31 g) samples of germanium, iron, aluminium, rhenium and osmium. The differences in size are due to differences in density.
Osmium
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Osmium is a chemical element; it has symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group. It was discovered in 1803 by Smithson Tennant, who name
Density
…equal to its mass concentration. Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium is the densest known element at standard conditions for temperature and pressure. To simplify comparisons of density across different systems of units…
Osmium crystals
Osmium, remelted pellet
Osmium tetroxide (OsO4)
Native platinum containing traces of the other platinum group metals