Oxygen (O)
Oxygen is a chemical element with symbol O and atomic number 8. Oxygen was discovered by Carl Wilhelm Scheele, in Uppsala, in 1773.
Molar mass units
Standard atomic weight
- Hydrogen (H)15.87
- Oxygen (O)1
- Sulfur (S)0.5
- Chlorine (Cl)0.45
- Iron (Fe)0.29