Iron |
Symbol | Fe |
---|---|
Latin name | Ferrum |
Atomic number | 26 |
Period | 4 |
Element category | Transition elements |
Relative atomic mass | 55.847 |
Group | VIII.B |
Electronegativity | 1.8 |
Oxidation numbers | 2, 3, 6 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d6 4s2 |
Density [g/cm3] | 7.874 |
State | Solid |
Melting point [°C] | 1535 |
Boiling point [°C] | 2750 |
Atomic radius [pm] | 156 |
Covalent radius [pm] | 125 |
Thermal conductivity [W m-1K-1] | 80.2 |
Heat capacity [J K-1g-1] | 0.449 |
Hardness [Mohs scale] | 4.0 |
Vickers hardness [MPa] | 608 |
Brinell hardness [MPa] | 490 |
Young's modulus [GPa] | 211 |
Electrical conductivity [S m-1] | 1 · 107 |
Electrical resistivity [10-6Ω.m] | 0.101 |
Shear modulus [GPa] | 82 |
1.st ionization energy [eV] | 7.9024 |
2.nd ionization energy [eV] | 16.18 |
3.rd ionization energy [eV] | 30.651 |
Stable isotopes | 4 |
Unstable isotopes | 6 |