Os
Osmium · element 76
Transition Metal · Solid at room temperature
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.
Key facts
Atomic mass
190.233 u
how heavy one atom is
Phase (room temp.)
Solid
Density
22.59 g/cm³
how tightly packed it is
Melting point
3306 K (3033 °C)
when solid turns to liquid
Boiling point
5285 K (5012 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
8
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
2.2
how strongly it pulls electrons
Electron configuration
[Xe] 4f14 5d6 6s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 14 · 2
electrons in each layer, inside to out
Discovered by
Smithson Tennant
who found it
Appearance
silvery, blue cast
what it looks like
Source: Wikipedia