Basic Information

Name: Oxygen 
Symbol: O 
Atomic Number: 8 
Atomic Mass: 15.9994 amu 
Melting Point: -218.4 °C (54.750008 K, -361.12 °F) 
Boiling Point: -183.0 °C (90.15 K, -297.4 °F) 
Number of Protons/Electrons: 8 
Number of Neutrons: 8 
Classification: Non-metal 
Crystal Structure: Cubic 
Density @ 293 K: 1.429 g/cm3 
Color: colorless
Date of Discovery: 1774 
Discoverer: Joseph Priestly 
Name Origin: From the Greek words oxus (acid) and gennan (generate) 
Uses: supports life 
Obtained From: from liquid air