26
Fe
55.845
Iron (Fe)
Element 26 · Period 4 · Group 8
transition-metal
solid at room temp
d-block
About Iron
Most used metal. Core of Earth. Essential for blood hemoglobin. Foundation of civilization.
Physical Properties
Atomic Mass
55.845 u
State at 25°C
Solid
Melting Point
1538 °C
Boiling Point
2861 °C
Density
7.874 g/cm³
Magnetism
Ferromagnetic
Atomic Properties
Electron Configuration
[Ar] 3d⁶ 4s²
Electron Shells
2, 8, 14, 2
Electronegativity
1.83
Atomic Radius
156 pm
Ionization Energy
763 kJ/mol
Oxidation States
+2, +3
Discovery & History
Discovered By
Ancient
Discovery Year
Ancient
Named By
Ancient
Name origin: Anglo-Saxon: iron; Symbol from Latin: ferrum
Frequently Asked Questions
- Is Iron a metal, nonmetal, or metalloid?
- Iron is classified as a transition-metal.
- What state is Iron in at room temperature?
- Iron is a solid at standard room temperature (25°C).
- What is the atomic mass of Iron?
- Iron has an atomic mass of 55.845 atomic mass units (u).
- Who discovered Iron?
- Iron was discovered by Ancient.
- Where is Iron on the periodic table?
- Iron is element number 26, located in period 4 and group 8.