oksigena
Oksigena is the chemical element with the symbol O and the atomic number 8. It is a colorless, odorless gas at room temperature and makes up about 21 percent of the Earth’s atmosphere. Oxygen is essential for most forms of aerobic life and is a key reactant in combustion and many chemical processes.
Historically, oxygen was independently isolated by Carl Wilhelm Scheele and Joseph Priestley in the 1770s, though
In nature, oxygen occurs in several forms. O2, the diatomic molecule, is the most abundant form in
Industry and medicine rely on oxygen in various ways. It is produced commercially by fractional distillation
Oxygen has three stable isotopes: O-16, O-17, and O-18, with O-16 by far the most abundant. It