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