Symbol	Co	Atomic radius: pm	125	Fusion: kJ/Mole	16.2
Name	Cobalt	Ionic radius: pm	(+2)65	Boiling point: °C	2927
Atomic number	27	Electron affinity	0.66	Melting point: °C	1495
Atomic weight	58.93	1st  ion potential	7.88	Specific Heat Cap: J/(g K)	0.42
Classification	Trans metal	Natural form	Solid	Thermal Cond: W/(cm K)	1.00
Configuration	[Ar]3d74s2	Crystal structure	Hex	Electrical Cond	0.172
Oxidation states	2,3	Density	8.86	Abundance: mg/kg-crust	25
Electronegativity	1.88	Vaporization: kJ/Mole	382.4
Cobalt was isolated in 1735 by a Swedish chemist, Georg Brandt, but compounds had been used for centuries to impart a blue color to glazes and ceramics.			Uses - alloys used in jet engines, magnets, cobalt glass (blue), ceramics, radiotherapeutic agent