26 Fe Iron 55,845 u

Iron

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Période
4
Groupe
8
Bloc
d-bloc
Phase (STP)
Solid

Iron is the most widely used metal on Earth and the main component of steel. It is essential for oxygen transport in blood as part of hemoglobin.

Apparence: Lustrous metallic with grayish tinge

About Iron

Iron is the most widely used of all metals and the principal ingredient of steel. This transition metal has atomic number 26 and an atomic mass of 55.845, a density of 7.87 g/cm³, and a melting point of 1811 K. Its [Ar] 3d6 4s2 configuration yields an electronegativity of 1.83 and a first ionization energy of 763 kJ/mol. Known and worked since antiquity, iron has no single discoverer. The element is also essential to biology, carrying oxygen in the blood as the metal center of hemoglobin. Combining strength with low cost, it sits in group 8, period 4, among the transition metals.

Propriétés physiques

Masse atomique 55.845 u
Densité 7.874 g/cm³
Point de fusion 1537.8 °C
Point d'ébullition 2860.8 °C
Phase à STP Solid
Rayon atomique 156.0 pm

Propriétés électroniques

Électronégativité 1.83
Énergie d'ionisation 762.5 eV
Affinité électronique 15.7 eV
Électrons de valence 8

Configuration électronique

Configuration [Ar] 3d⁶ 4s²

Electron Shell Configuration

Iron electron shell configuration Fe 2e⁻ 8e⁻ 14e⁻ 2e⁻
Electron shell structure of Iron — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 14
4 (N) 2

Position in Periodic Table

Iron position in the periodic table Fe

Découverte

Découvert par: Ancient

Compounds Containing Iron

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Frequently Asked Questions

What is Iron?
Iron (Fe) is a chemical element with atomic number 26. It is a solid at standard temperature and pressure, classified as a métal de transition.
What are the key properties of Iron?
Iron has an atomic mass of 55.845 u, density of 7.874 g/cm³, melting point of 1537.8°C, boiling point of 2860.8°C.
What is the electron configuration of Iron?
The electron configuration of Iron is [Ar] 3d6 4s2. It is in the d-block of the periodic table.
Who discovered Iron?
Iron was discovered by Ancient.
What is the electronegativity of Iron?
Iron has an electronegativity of 1.83 on the Pauling scale.