Periodic Table of Elements showing Iridium transition elements


Atomic Number77
Molar Mass192.2 gmol-1
Electron Configuration[Xe]4f145d76s2
Normal Statesolid metal
Density @STP22.56 g cm-3
Melting Point2446oC
Boiling Point4428oC
Stable Isotopes191Ir, 193Ir
Atomic Radius136 pm
Ionic Radius75 (3+) pm
Electronegativity (Pauling)2.2
Ionization Energy (1st)880 kJ mol-1
Ionization Energy (2nd)1680 kJ mol-1
Ionization Energy (3rd)2600 kJ mol-1
Molar Heat Capacity25.1 J K-1mol-1
Standard Molar Entropy35.5 J K-1mol-1
Enthalpy of Fusion26.4 kJ mol-1
Enthalpy of Vapourization563.6 kJ mol-1
[Back to Periodic table]

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