Symbol	Os	Atomic radius: pm	134	Fusion: kJ/Mole	57.85
Name	Osmium	Ionic radius: pm	(+4)63	Boiling point: °C	5012
Atomic number	76	Electron affinity	1.10	Melting point: °C	3033
Atomic weight	190.2	1st  ion potential	8.7	Specific Heat Cap: J/(g K)	0.13
Classification	Trans metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.88
Configuration	[Xe]4f145d66s2	Crystal structure	Hex	Electrical Cond	0.109
Oxidation states	2,3,4,6,8	Density	22.6	Abundance: mg/kg-crust	0.002
Electronegativity	2.2	Vaporization: kJ/Mole	627.6
The English chemist, Smithson Tennant, discovered osmium along with iridium in the residues of platinum ores.			Uses - hard alloys, phonograph needles, electrical light filaments, fountain pen tips