77
Ir
Iridium
Iridium
Iridium (Ir)
Transition Metals · Solid · Period 6 · Group 9
Element Properties
- Atomic Number
- 77
- Symbol
- Ir
- Atomic Mass
- 192.22
- Category
- Transition Metals
- Standard State
- Solid
- Period
- 6
- Group
- 9
- Electronegativity
- 2.2
- Atomic Radius
- 202
- Ionization Energy
- 9.1
- Electron Affinity
- 1.56
- Oxidation States
- +4, +3
- Melting Point
- 2719 K (2445.85 °C)
- Boiling Point
- 4701 K (4427.85 °C)
- Density
- 22.42
- Electron Configuration
- [Xe]6s2 4f14 5d7
- Year Discovered
- 1803
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Frequently asked questions
What is the atomic number of Iridium?
The atomic number of Iridium is 77, which equals the number of protons in its nucleus.
What is the atomic mass of Iridium?
The atomic mass of Iridium is approximately 192.22 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Iridium?
The electron configuration of Iridium is [Xe]6s2 4f14 5d7.
Where is Iridium in the periodic table?
Iridium is located in period 6, group 9.
When was Iridium discovered?
Iridium was discovered in 1803.