Symbol	O	Atomic radius: pm	74	Fusion: kJ/Mole	0.44
Name	Oxygen	Ionic radius: pm	(-2)140	Boiling point: °C	-183
Atomic number	8	Electron affinity	1.46	Melting point: °C	-219
Atomic weight	16.00	1st  ion potential	13.62	Specific Heat Cap: J/(g K)	0.92
Classification	Non-metal	Natural form	Gas(O2)	Thermal Cond: W/(cm K)	0.003
Configuration	1s22s2p4	Crystal structure	-	Electrical Cond	-
Oxidation states	-2	Density	1.43	Abundance: mg/kg-crust	461,000
Electronegativity	3.44	Vaporization: kJ/Mole	6.82
Oxygen was discovered in 1774 by Joseph Priestly.			Uses - oxy-acetylene welding, rocket fuel, steel manufacturing, aids respiration in hospital patients, protects against sun's rays as ozone (O3), supports life