Iridium
transition metal
Properties
- Atomic number
- 77
- Atomic mass
- 192.217 u
- Category
- transition metal
- Group
- 9
- Period
- 6
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 2.2 (Pauling)
- Density
- 22.56 g/cm³
- Melting point
- 2445.85 °C
- Boiling point
- 4129.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁷
Noble-gas shorthand: [Xe] 4f¹⁴ 5d⁷ 6s²
Electrons per shell: 2, 8, 18, 32, 15, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Iridium
Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable.
- Discovered by Smithson Tennant
- Appearance: silvery white
Iridium: frequently asked questions
- What is Iridium?
- Iridium (Ir) is the chemical element with atomic number 77. It is a metal: specifically a transition metal.
- What is the atomic number of Iridium?
- Iridium's atomic number is 77, which means every Iridium atom has 77 protons in its nucleus.
- What is the electron configuration of Iridium?
- The electron configuration of Iridium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d7 (noble-gas shorthand: [Xe] 4f14 5d7 6s2). Its electrons are arranged in shells of 2, 8, 18, 32, 15, 2, with 2 in the outermost shell.
- Is Iridium a metal or a nonmetal?
- Iridium is a metal: specifically a transition metal.
- What group and period is Iridium in?
- Iridium is in group 9 and period 6 of the periodic table.
- Is Iridium a solid, liquid, or gas?
- At room temperature, Iridium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.