77 Ir
Transition metal
Iridium
Linked to dinosaur extinction.
Properties of Iridium
- Atomic number (Z)
- 77
- Symbol
- Ir
- Atomic mass
- 192.22 g/mol
- Category
- Transition metal
- Group
- 9
- Period
- 6
- Electron configuration
- [Xe] 4f¹⁴ 5d⁷ 6s²
- Electronegativity (Pauling)
- 2.2
- Atomic radius
- 180 pm
- First ionization energy
- 880 kJ/mol
- Melting point
- 2719 K (2445.8 °C)
- Boiling point
- 4701 K (4427.9 °C)
- Density
- 22.56 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1803
Frequently asked questions
What is Iridium?
Iridium (Ir) is a transition metal, element number 77 on the periodic table. Linked to dinosaur extinction.
What is the atomic number and atomic mass of Iridium?
Iridium has atomic number 77 and an atomic mass of about 192.22 g/mol.
What is the electron configuration of Iridium?
The electron configuration of Iridium is [Xe] 4f¹⁴ 5d⁷ 6s².
Where is Iridium on the periodic table?
Iridium sits in group 9, period 6, and is classified as a transition metal.