26 Fe
Transition metal
Iron
Core of Earth; in hemoglobin.
Properties of Iron
- Atomic number (Z)
- 26
- Symbol
- Fe
- Atomic mass
- 55.845 g/mol
- Category
- Transition metal
- Group
- 8
- Period
- 4
- Electron configuration
- [Ar] 3d⁶ 4s²
- Electronegativity (Pauling)
- 1.83
- Atomic radius
- 156 pm
- First ionization energy
- 762 kJ/mol
- Melting point
- 1811 K (1537.8 °C)
- Boiling point
- 3134 K (2860.8 °C)
- Density
- 7.874 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Known since ancient times
Frequently asked questions
What is Iron?
Iron (Fe) is a transition metal, element number 26 on the periodic table. Core of Earth; in hemoglobin.
What is the atomic number and atomic mass of Iron?
Iron has atomic number 26 and an atomic mass of about 55.845 g/mol.
What is the electron configuration of Iron?
The electron configuration of Iron is [Ar] 3d⁶ 4s².
Where is Iron on the periodic table?
Iron sits in group 8, period 4, and is classified as a transition metal.