Oxygen 1


Oxygen 1 :

(Chem; Symb: 0) A gas, bp -182. 9ºC, fp -218. 4ºC, the most abundant element on earth, making up approx 21% of the atmosphere and occurring in water and metallic oxides. Oxygen is essential to the life cycle of plants and animals, as well as to many chemical processes, including combustion. See also: Ozone

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