Symbol	Re	Atomic radius: pm	137	Fusion: kJ/Mole	60.43
Name	Rhenium	Ionic radius: pm	(+7)53	Boiling point: °C	5596
Atomic number	75	Electron affinity	0.15	Melting point: °C	3186
Atomic weight	186.2	1st  ion potential	7.88	Specific Heat Cap: J/(g K)	0.14
Classification	Trans metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.48
Configuration	[Xe]4f145d56s2	Crystal structure	Hex	Electrical Cond	0.0542
Oxidation states	7,6,4,2,-1	Density	20.8	Abundance: mg/kg-crust	<0.001
Electronegativity	1.9	Vaporization: kJ/Mole	707.1
Dmitri Ivanovich Mendeleyev predicted the existence of Rhenium in 1869.  It was discovered in 1925 by the German chemists Ida and Walter Noddack and Otto Carl Berg.			Uses - catalysts, thermocouples, filaments for mass spectrographs, wire in flash lamps for photography