Periodic Table · element Oxygen O · Z 8 atomic number8atomic mass15.999notationOgroup16: Oxygenperiod2state0cGasstate20cGasoccurrencePrimordialdensity0.001429melting pt-218.3boiling pt-182.95discovered1771abundance461000bio classBulkore mineralsthe atmosphere (21 %)mined asNot minedextractionCryogenic air separation, or pressure-swing adsorption for smaller volumes. bio roleThe largest share of body mass, about 65 %, most of it water. Also the terminal electron acceptor that makes aerobic respiration roughly sixteen times more productive than fermentation. categories#Diatomicnonmetal#Nonmetal#Chalcogens machinesFuel CellLead–Acid BatteryPressurized Water ReactorLiquid-Propellant Rocket EngineSolid-Propellant Rocket Motor skillsMIG WeldingFDM 3D PrintingMortise and Tenon JointSharpening an EdgeMixing and Placing Concrete equationsIdeal Gas LawBoyle's LawCharles's LawGay-Lussac's LawAvogadro's LawDalton's Law of Partial PressuresVan der Waals EquationNewton–Laplace Speed of SoundEquipartition TheoremGriffith Fracture CriterionSeismic Wave SpeedsSnell's LawChandrasekhar LimitArrhenius EquationGibbs Free EnergyMichaelis–Menten EquationTsiolkovsky Rocket EquationSpecific Impulse Referenced by equationArrhenius EquationAvogadro's LawBoyle's LawChandrasekhar LimitCharles's LawDalton's Law of Partial PressuresEquipartition TheoremGay-Lussac's LawGibbs Free EnergyGriffith Fracture CriterionIdeal Gas LawMichaelis–Menten EquationNewton–Laplace Speed of SoundSeismic Wave SpeedsSnell's LawSpecific ImpulseTsiolkovsky Rocket EquationVan der Waals Equation machineFuel CellLead–Acid BatteryLiquid-Propellant Rocket EnginePressurized Water ReactorSolid-Propellant Rocket Motor skillFDM 3D PrintingMIG WeldingMixing and Placing ConcreteMortise and Tenon JointSharpening an Edge Open on the Periodic Table shelf — the interactive card, the filters, and everything alongside it. From the All Periodical Elements database in Notion, last edited 2026-08-25. This page is the row, rendered by the build; nothing on it is written by hand.