Osmium (Os), element 76 – Learn Acer periodic table

Osmium

Transition metal, atomic number 76.

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/cm3.

Facts

Symbol Os. Atomic mass 190.233 u. Group 8, period 6. Electron configuration [Xe] 4f14 5d6 6s2. Electrons per shell 2, 8, 18, 32, 14, 2. State at room temperature: Solid. Melting point 3032.8 °C, boiling point 5011.9 °C. Discovered by Smithson Tennant.

Element data from Wikipedia, CC BY-SA 3.0.