77
192.217 u
Ir
Iridium
Transition Metal
Atomic Structure
Physical State
Group
9
Period
6
Block
d
Electron Configuration
[Xe] 4f¹⁴ 5d⁷ 6s²
Physical Properties
Atomic Mass:
192.217 u
Electronegativity:
2.2
Atomic Radius:
180 pm
Ionization Energy:
9.1 eV
Density:
22.56 g/cm³
Melting Point:
2719 K
Boiling Point:
4701 K
Historical Information
Discovered By:
Smithson Tennant
Year Discovered:
1803