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