NO. 026Transition

Fe

Iron

Iron is one of the most abundant metals on Earth and forms the backbone of modern infrastructure and biological oxygen transport.

Crystal Structure

Body-centered cubic (bcc)

Atomic Mass55.85 u

Density7.87 g/cm³

Melting Point1811 K

Boiling Point3134 K

Atomic Radius126 pm

Electronegativity1.83

Ionization Energy762 kJ/mol

Electron Affinity16 kJ/mol

Bonding TypeMetallic

Oxidation States2, 3

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Ar] 3d6 4s2

Discovered ByAncient civilizations

Year-2000

Known Isotopes

Fe-54Fe-56Fe-57Fe-58