Stable isotope Rhenium (Re)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Re-185 75 110 184.952955 37.40% 93.00-96.80% Metal
Re-187 75 112 186.955750 62.60% >99.00% Metal
 

Properties of Rhenium

Name Rhenium
Symbol Re
Atomic number 75
Atomic weight 186.21
Standard state Solid at 298 ºK
CAS Registry ID 7440-15-5
Group in periodic table 7
Group name None
Period in periodic table 6
Block in periodic table d-block
Color Grayish white
Classification Metallic
Melting point 3180 °C
Boiling point 5627 °C
Vaporization point 5627 ºC
Thermal conductivity 48.0 W/(m·K) at 298.2 °K
Electrical resistivity 19.14 µΩ·cm at 20 °C
Electronegativity 1.9
Specific heat 0.14 kJ/kg K
Heat of vaporization 705 kJ·mol-1
Heat of fusion 33 kJ·mol-1
Density of liquid 18.9 g/cm3 at 3180 °C
Density of solid 20.53 g/cm3
Electron configuration [Xe]4f145d56s2
Oxidation states -1, +1, +2, +3, +4, +5, +6, +7
Most common oxidation state +7