Iridium
Ir
Iridium
Transition Metal
Atomic number:
77
Atomic weight:
192.22
Shells:
2,8,18,32,15,2
Orbitals:
[Xe] 4f14 5d7 6s2
Melting point:
2410°C
Boiling point:
4130°C
Covalent radius:
1.27
Å
Atomic volume:
8.54
cm³/mol
Atomic radius:
1.87
Å
Ionic radius:
.63 (+4)
Å
Electronegativity:
2.20
Oxidation states:
2,3,(4),6
1st ionization pot.:
9.1
V
2nd ionization pot.:
--
V
3rd ionization pot.:
--
V
Specific heat:
0.130
J/gK
Heat of fusion:
26.10
kJ/mol
Heat of vapor.:
604.0
kJ/mol
Thermal conduct.:
1.47
W/cmK
Electrical conduct.:
0.197
10^6/cm ohm
Density:
22.42
g/cm³
Valence:
3
