Name :  Oxygen
Symbol :  O
Atomic Number :  8
Atomic Weight :  15.9994
Specific Heat :  0.92 J/gK
Melting Point :  -218.4°C
Vaporization :  3.4099 kJ/mol
Boiling Point :  -182.962°C
Electronegativity :  3.44
Density@293 K :  0.001429 g/cm³
Discovered :  Joseph Priestly, Carl Wilhelm Scheele, England/Sweden, 1774
Description :  Colorless, odorless, tasteless gas pale blue liquid. Third most abundant element in the universe. It is the most abundant element in the earth\'s crust, and makes up almost 21% of the atmosphere.
Uses :  Used in steel making, welding, and supporting life. Naturally occuring ozone (O3) in the upper atmosphere shields the earth from ultraviolet radiation.