Iron (Fe) — Element 26

26 Fe 55.845

Iron

Element 26 · 55.845 u · d-block

transition metal

The most used metal on Earth. Core component of steel, and the element that carries oxygen in our blood via hemoglobin.

Phase (STP)

Solid

Melting Point

1538 °C

Boiling Point

2861 °C

Density

7.874 g/cm³

Electronegativity

1.83

Atomic Radius

140 pm

Ionization Energy

762 kJ/mol

Electron Affinity

15 kJ/mol

Discovered

Ancient · Known since antiquity

Electron Configuration

[Ar] 3d6 4s2