Noble metals are a group of metals that are highly resistant to corrosion, oxidation, and chemical attack, even under harsh conditions. The most well-known noble metals include gold (Au), silver (Ag), and platinum (Pt), along with others like palladium, rhodium, iridium, and ruthenium.

These metals are called “noble” because they maintain their luster and purity over time, much like noble gases remain unreactive. Their resistance to corrosion makes them ideal for:

• Jewelry and coins (e.g., gold and silver)
• Electronics (e.g., gold for conductive coatings)
• Catalysis (e.g., platinum in catalytic converters)
• Medical implants and dental work, due to their biocompatibility

Their stability arises from their filled or nearly filled d-orbitals, which reduce their tendency to lose electrons or react with other substances. Noble metals are rare and valuable, not only for their beauty but also for their industrial and technological importance.