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
Osmium crystals
Osmium, remelted pellet
Osmium tetroxide (OsO4)
Native platinum containing traces of the other platinum group metals
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
Osmium
…platinum group. It was discovered in 1803 by Smithson Tennant, who named it for the characteristic smell of its volatile oxide. Osmium has the highest density of any stable element and one of the lowest abundances in the Earth's crust, where it is mainly found alongside other platinum group metals and in ores…
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.