Iron (Fe) — Transition metal. Atomic number 26.
Lustrous gray metal
- Atomic number: 26
- Symbol: Fe
- Atomic mass: 55.845 u
- Category: Transition metal
- State: Solid
- Melting point: 1537.85 °C / 1811 K
- Boiling point: 2860.85 °C / 3134 K
- Density: 7.87 g/cm³ (20°C)
- Electron configuration: [Ar] 3d6 4s2
- Oxidation states: +2, +3
- Electronegativity: 1.83
- Discovered by: Known since antiquity
Common uses: Steel, Machinery, Construction, Magnets
Biological role: Essential for hemoglobin and oxygen transport.
Frequently Asked Questions about Iron
What is the atomic number of iron?
Iron has an atomic number of 26, meaning each atom contains 26 protons in its nucleus.
What is the atomic mass of iron?
The standard atomic weight of iron is 55.845 u (unified atomic mass units).
What category does iron belong to?
Iron is classified as a transition metal.
What is the state of iron at room temperature?
Iron is a solid at 20 °C (68 °F).
What is the melting point of iron?
The melting point of iron is 1537.85 °C / 1811 K.
What is the boiling point of iron?
The boiling point of iron is 2860.85 °C / 3134 K.
What is the density of iron?
The density of iron is 7.87 g/cm³ (20°C).
What is the electronegativity of iron?
Iron has a Pauling electronegativity of 1.83.
What is the electron configuration of iron?
The electron configuration of iron is [Ar] 3d6 4s2.
What are the common oxidation states of iron?
Iron commonly exhibits the following oxidation states: +2, +3.
Is iron radioactive?
Iron is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of iron?
Essential for hemoglobin and oxygen transport.
What are the common uses of iron?
Iron is used for: Steel; Machinery; Construction; Magnets.
