Argon is classified as a non-metal. It is one of the noble gases located in Group 18 of the periodic table, which also includes helium, neon, krypton, xenon, and radon. Non-metals are generally characterized by their lack of metallic properties, such as conduction of electricity and malleability.
Argon is colorless, odorless, and tasteless, and it exists as a gas at room temperature. Its non-reactive nature is a key feature that contributes to its classification as a non-metal; it does not readily form chemical bonds with other elements, which is a typical behavior of non-metals. This characteristic makes argon useful in various applications, such as providing an inert atmosphere for welding and in light bulbs to prevent oxidation of the filament.