Symbol	Yb	Atomic radius: pm	194	Fusion: kJ/Mole	0.16
Name	Ytterbium	Ionic radius: pm	(+3)99	Boiling point: °C	1196
Atomic number	70	Electron affinity	-	Melting point: °C	819
Atomic weight	173.0	1st  ion potential	6.25	Specific Heat Cap: J/(g K)	0.16
Classification	Trans metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.39
Configuration	[Xe]4f146s2	Crystal structure	FCC	Electrical Cond	0.0351
Oxidation states	2,3	Density	6.90	Abundance: mg/kg-crust	3.2
Electronegativity	-	Vaporization: kJ/Mole	159.0
The first concentrate of ytterbium was obtained in 1878 by J.C.G. de Marignac.  Georges Urbain and Carl Auer von Welsbach showed in 1907-1908 that what Marignac had found was in fact two elements, now known as ytterbium and lutetium.			Uses - alloys, metallurgic and chemical experiments, lasers