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