👉 The term "argon" is a chemical element with the symbol Ar and atomic number 15. It is a noble gas that has a very strong reactivity, making it useful in various applications such as explosives, corrosion control, and lighters. The name "argon" comes from the Latin word for "gas," which indicates its high density and low boiling point. This element's chemical properties are unique and make it particularly suited for use in chemical reactions that involve gases or liquids.