Tungsten |
Symbol | W |
---|---|
Latin name | Wolframium |
Atomic number | 74 |
Period | 6 |
Element category | Transition elements |
Relative atomic mass | 183.85 |
Group | VI.B |
Electronegativity | 1.9 |
Oxidation numbers | 2, 3, 4, 5, 6 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d4 6s2 |
Density [g/cm3] | 19.3 |
State | Solid |
Melting point [°C] | 3387 |
Boiling point [°C] | 5660 |
Atomic radius [pm] | 193 |
Covalent radius [pm] | 146 |
Thermal conductivity [W m-1K-1] | 174 |
Heat capacity [J K-1g-1] | 0.13 |
Discovery | 1758 |
Hardness [Mohs scale] | 7.5 |
Vickers hardness [MPa] | 3430 |
Brinell hardness [MPa] | 2570 |
Young's modulus [GPa] | 411 |
Electrical conductivity [S m-1] | 1.8 · 107 |
Electrical resistivity [10-6Ω.m] | 0.0536 |
Shear modulus [GPa] | 161 |
1.st ionization energy [eV] | 7.98 |
Stable isotopes | 5 |
Unstable isotopes | 16 |