O
8 diatomic nonmetal
Oxígeno
Symbol O
Atomic Mass 15.999
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.
Properties
- Phase: Gas
- Density: 1.429 g/cm³
- Melting Point: 54.36 K
- Boiling Point: 90.188 K