Oxygen is a gas without color and odor. Organisms live by inhaling oxygen from the air. In addition it is useful in many industries, science tools. In steel making furnaces, its use in welding flames is well known. Oxygen minus 3 degrees C is a brown liquid. It is used as a rocket fuel.
Oxygen is abundant on earth. It has existed since the origin of the earth. But it was identified by a scientist by the name of Joseph Priestley in AD 9, a scientist named Lavoisieit, named it "Oxygen." In Greek, 'oxi' means to produce acid and genus. Scientists believe that oxygen is needed to produce every acid. So his name fell. Welding was invented in 1. Robert Goddard of America landed a rocket using oxygen for the first time. Oxygen can be released by cryogenic distillation method from the air. This oxygen is used in hospitals.
Earth's atmosphere contains 5 percent oxygen in dry air. Oxygen is not a flammable gas but its presence promotes other inflammable substances. The presence of oxygen is required in the burning process. Earth's crust has the highest amounts of silicon, aluminum, iron, calcium, and oxygen.
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