Noble metals are a group of metals known for their resistance to corrosion and oxidation. This group primarily includes gold, silver, platinum, palladium, and rhodium. These metals are often used in jewelry, electronics, and various industrial applications due to their durability and aesthetic appeal. The term "noble" reflects their chemical stability, meaning they do not easily react with other elements. This property makes noble metals valuable in catalytic converters, where they help reduce harmful emissions from vehicles. Their rarity and unique characteristics contribute to their high market value and desirability in various fields.