Osmium Os
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Osmium (from Greek osme (ὀσμή) meaning "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm^3.
76
Atomic Number
190.23 u
Atomic Mass
3300.15 K
Melting Point
5285 K
Boiling Point
22.59 g/cm³
Density
1.9 Å
Atomic Radius
1.44 Å
Covalent Radius
2.2
Electronegativity
8.44 eV
First Ionization Energy
103.99
Electron Affinity
6
Number of Shells
2, 8, 18, 32, 14, 2
Electron Shell Occupations
0.13 J/g
Specific Heat