Argon is a noble gas, meaning that it is both stable and nonreactive. This stability helps give it its name, which comes from the Greek word "argos," which means "idle." Argon is fairly common on Earth, making up about 1% of the atmosphere. Because it is inert, it is widely used in a variety of ways, from light bulbs (fluorescent bulbs), to forming steel. Argon is often used in lieu of oxygen when making metal alloys, as it prevents the process of oxidation.
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