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Atomic Number	26

Atomic Symbol	Fe

Atomic Weight	55.854 amu

Group	Transition, 8

Form	Solid

Density @ STP	7.87 g/cm³

Melting Point	1538 °C (2800.4 °F, 1811.2 °K)

Boiling Point	2861 °C (5181.8 °F, 3134.2 °K)

Heat of Fusion	13.81 kJ/mol

Heat of Vaporization	347 kJ/mol

First Ionization Potential	7.9024 eV

Electronegativity (on Pauling scale	1.83

Specific Heat Capacity	0.449 J/g K

Ground State Electron Configuration	3d⁶ 4s²

Oxidation State(s)	+2, +3

Stable Isotopes and Natural Abundance on Earth	⁵⁴Fe, 5.8%; ⁵⁶Fe, 91.72%; ⁵⁷Fe, 2.1%; ⁵⁸Fe, 0.28%

Selected Radioisotopes	⁵²Fe; ⁵⁵Fe; ⁵⁹Fe

Atomic Radius	156 pm

Crystal Structure	Cubic