77
Ir
iridium
192.22

General properties

Group
group 9
Period
period 6
Category
transition metals
Standard atomic weight
192.217(2)
Melting point
2719 K (2446 °C)
Boiling point
4403 K (4130 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Xe] 4f¹⁴ 5d⁷ 6s²
Electrons per shell
2, 8, 18, 32, 15, 2
Electronegativity
2.20
Density
22.56 g/cm³
Oxidation states
−3, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8, +9
CAS Number
7439-88-5