Rhenium |
Symbol | Re |
---|---|
Latin name | Rhenium |
Atomic number | 75 |
Period | 6 |
Element category | Transition elements |
Relative atomic mass | 186.207 |
Group | VII.B |
Electronegativity | 1.9 |
Oxidation numbers | 2, 3, 4, 6, 7 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d5 6s2 |
Density [g/cm3] | 21.03 |
State | Solid |
Melting point [°C] | 3180 |
Boiling point [°C] | 5630 |
Atomic radius [pm] | 188 |
Covalent radius [pm] | 159 |
Thermal conductivity [W m-1K-1] | 47.9 |
Heat capacity [J K-1g-1] | 0.137 |
Discovery | 1925 |
Hardness [Mohs scale] | 7.0 |
Vickers hardness [MPa] | 2450 |
Brinell hardness [MPa] | 1320 |
Young's modulus [GPa] | 463 |
Electrical conductivity [S m-1] | 5.6 · 106 |
Shear modulus [GPa] | 178 |
1.st ionization energy [eV] | 7.88 |
Stable isotopes | 2 |
Unstable isotopes | 20 |