Electronic data		Thermal data		Steric data
Shells: 2,8,18,32,13,2 Orbitals: [Xe] 4f14 5d5 6s2 Electronegativity: 1.5, 1.9 1. Ionization potential: 7.88 eV 2. Ionization potential: -- eV 3. Ionization potential: -- eV Oxidation states: 7,6,4,2,-1 Electrical conductivity: 0.0542 10^6		Melting point: 3180 °C Boiling point: 5627 °C (estimated) Specific heat: 0.13 J/gK Heat of fusion: 33.20 kJ/mol Heat of vaporization: 715.0 kJ/mol Thermal conductivity: 0.479 W/cmK		Atomic radius: 1.97 Å Ionic radius: 0.53 Å () Covalent radius: 1.28 Å Atomic volume: 8.85 cm³/mol Density (293 K): 21.0 g/cm³ Crystal structure: Hexagonal

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
182Re	0	182	7	2.67d	EC	View
182Rem	0	182	2	12.7h	EC,+	View
183Re	0	183	5/2	70d	EC	View
184Re	0	184	3	38d	EC	View
184Rem	0	184	8	165d	IT,EC	View
185Re	37.07	184.953	5/2	--	stable	--
186Re	0	186	1	3.777d	-,EC	View
187Re	62.93	186.956	5/2	4.1E10y	-	View
188Re	0	188	1	16.94h	-	View

Legend

Name origin:	Latin: Rhenus, the Rhine River.
Description:	Rare and costly, dense, silvery-white metal.
Discovered by:	Walter Noddack, Ida Tacke, Otto Berg
Year:	1925
Place:	Germany
Sources:	Found in small amounts in gadolinite and molybdenite. Has a very high melting point.
Use(s):	Mixed with tungsten or platinum to make filaments for mass spectrographs. Its main value is as a trace alloying agent for hardening metal components that are subjected to continuous frictional forces.