The chemical element with the symbol "Au" is gold. Gold is a precious metal known for its luster, ductility, and resistance to corrosion, making it highly valued in jewelry, currency, and electronics. With an atomic number of 79, gold has been used by civilizations for centuries as a symbol of wealth and power. Due to its unique properties, it conducts electricity well and is often alloyed with other metals for enhanced strength and durability in various applications. Gold's historical and cultural significance extends beyond its economic value, influencing art, music, and even social systems throughout history.