Iron
Transition Metal
Iron (Fe) is a chemical element with atomic number 26, classified as a transition metal. At room temperature it is a solid. It has been known since ancient times.
Properties
- Atomic number
- 26
- Atomic mass
- 55.845 u
- Category
- Transition Metal
- Group
- 8
- Period
- 4
- Block
- d-block
- Electron configuration
- [Ar] 3d⁶ 4s²
- Phase at STP
- Solid
- Density
- 7.874 g/cm³
- Melting point
- 1811 K (1537.8 °C)
- Boiling point
- 3134 K (2860.8 °C)
- Electronegativity
- 1.83
- Atomic radius
- 156 pm
- Ionization energy
- 7.902 eV
- Discovery
- Known since ancient times
Common uses
Steel, magnets, construction, hemoglobin in blood
Did you know?
Most common element on Earth by mass and essential for life.