Oxygen is the chemical element with the symbol O and atomic number 8.
It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
Oxygen is Earth's most abundant element, and after hydrogen and helium, it is the third-most abundant element in the universe.
Last Updated on 3 years by pinc
