All chemical elements

Symbol

Ir

Atomic number

77

Chemical property

Transition metal

Origin o the name

Iris, the Greek goddess of the rainbow

Group

9

Period

6

Atomic weight (u)

192.217

Atomic weight uncertainty (u)

0.003

Density (g/cm³)

22.56

Melting point (K)

2719

Boiling point (K)

4701

Heat capacity (J/(g·K))

0.131

Electro-negativity

2.2

Abundance in earth's crust (mg/kg)

0.001