![]() ![]() At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula OĢ. ![]() Oxygen is Earth's most abundant element, and after hydrogen and helium, it is the third-most abundant element in the universe. ![]() 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 a chemical element it has symbol O and atomic number 8. The Supplemental Files page has resources for connecting other systems to the O*NET-SOC taxonomy, as well as downloadable datasets such as Detailed Work Activities, Tools & Technology, and Spanish translations of the datasets.(O 2) 90.188 K (−182.962 ☌, −297.332 ☏)
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