76
190.23 u
Os
Osmium
Transition Metal
Atomic Structure
Physical State
Group
8
Period
6
Block
d
Electron Configuration
[Xe] 4f¹⁴ 5d⁶ 6s²
Physical Properties
Atomic Mass:
190.23 u
Electronegativity:
2.2
Atomic Radius:
185 pm
Ionization Energy:
8.7 eV
Density:
22.59 g/cm³
Melting Point:
3306 K
Boiling Point:
5285 K
Historical Information
Discovered By:
Smithson Tennant
Year Discovered:
1803