Oxygen is one of the most reactive and biologically important elements on Earth It is a colorless, odorless, and tasteless gas that makes up approximately 21% of the Earth's atmosphere.. The main use of Oxygen Gas is in the field of Healthcare where it is essential as a breathing aid.It also has many industrial applications.
The discovery of oxygen is a classic example of "independent discovery" by three prominent scientists in the late 18th century. Carl Wilhelm Scheele (1772): A Swedish pharmacist who was actually the first to isolate the gas, which he called "fire air" because it supported combustion so well. However, he was slow to publish his results. Joseph Priestley (1774): An English chemist who independently discovered oxygen by heating red mercuric oxide with a magnifying glass. He called it "dephlogisticated air." Because he published his findings first, he is often given the primary credit for the discovery. Antoine Lavoisier (1777): While he didn't discover the gas itself, the French chemist Lavoisier was the first to recognize it as a chemical element and understand its role in combustion. He gave it the name "oxygen," from the Greek words meaning "acid-former," as he mistakenly believed all acids required oxygen.
Oxygen can be a sole atom with the symbol O. With 2 atoms of Oxygen joined the symbol becomes O2.
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