75
186.21
Re
Rhenium
Identification
CAS Number: 7440-15-5
Discovery Year: 1925
Discoverer: Walter Noddack, Ida Tacke, Otto Berg
Discovery Location: Germany
Properties
Atomic Dimensions
Atomic Radius: 135 pm →
Atomic Radius (Rahm): 249.00000000000003 pm
Covalent Radius: 151 pm →Van der Waals Radius: 216 pm
Metallic Radius: 128 pm
Atomic Volume: 8.85 cm³/mol
Lattice Constant: 2.76 Å
Thermodynamics
Electronic Structure
Electron Config: [Xe] 4f14 5d5 6s2
Block: d
Period: 6 →Group: 7 →Electronegativity: 1.9 →Electron Affinity: 0.15 eV →Oxidation States: -1, +2, +3, +4, +5
Abundance & Geochemistry
Crust Abundance: 0.0007 mg/kg
Sea Abundance: 0.000004 mg/L
Goldschmidt Class: siderophile
About
Silvery-white metallic transition element. Obtained as a by-product of molybdenum refinement. Rhenium-molybdenum alloys are superconducting.
Isotopes
Re-187 187 62.60%
Re-185 185 37.40%
