Iridium (Ir) in the periodic table — PeriodicTable

Iridium (Ir) in the periodic tableIridium is element 77, a transition metal of the d block, in group 9, period 6. Its ground-state configuration is [Xe] 4f14 5d7 6s2, and it usually shows the oxidation states 0, 2, 3, 4, 6.It was discovered in 1803, by Tennant and Andere.Name origin: Iris, the Greek goddess of the rainbow. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

192.217

Da

Electronegativity

2.2

First ionisation energy

880

kJ/mol

Covalent radius

137

pm

Melting point

2719

K

Boiling point

4701

K

Density

22.56

g/cm³

Abundance

0.001

mg/kg

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