#26
Iron
transition metal· Solid·55.8452 u
Iron is a chemical element with symbol Fe (from Latin:ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core.
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Identity
- Symbol
- Fe
- Atomic Number
- 26
- Atomic Mass
- 55.8452 u
- Category
- transition metal
- Block
- d-block
- Period
- 4
- Group
- 8
- Appearance
- lustrous metallic with a grayish tinge
- Year Discovered
- Before 5000 BCE
- Discovered By
- http://www.wikidata.org/.well-known/genid/c150a46aad8c85725250e72a762569ed
Electrons
- Configuration
- [Ar] 3d6 4s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d6
- Shells
- 2, 8, 14, 2
- Electronegativity
- 1.83
- Electron Affinity
- 14.785
- Oxidation States
- +3, +2
- Ionization Energies
- 762.5, 1561.9, 2957, 5290, 7240 … +21 more
Physical Properties
- State at
- Solid
- Melting Point
- 1811
- Boiling Point
- 3134
- Density
- 7.874
- Molar Heat
- 25.1 J/(mol·K)
- Crystal Structure
- BCC
- Magnetic Ordering
- Ferromagnetic
Mechanical
- Atomic Radius
- 156 pm
- Covalent Radius
- 132 pm
- Van der Waals
- 194 pm
- Metallic Radius
- 126 pm
- Mohs Hardness
- 4
- Brinell Hardness
- 490 MPa MPa
- Vickers Hardness
- 608 MPa MPa
- Bulk Modulus
- 170 GPa GPa
- Shear Modulus
- 82 GPa GPa
- Young's Modulus
- 211 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 80.4 W/(m K) W/(m·K)
- Electrical Conductivity
- 10 MS/m S/m
- Specific Heat
- 449 J/(kg K) J/(g·K)
- Heat of Vaporization
- 340 kJ/mol kJ/mol
- Heat of Fusion
- 13.8 kJ/mol kJ/mol
Abundance
- Universe
- 1090 ppm
- Sun
- 1000 ppm
- Meteorite
- 22.0%
- Earth's Crust
- 7.874 ppm
- Ocean
- 2.00 ppb
- Human Body
- 60 ppm