Copper is a reddish-brown metal known for its excellent electrical and thermal conductivity. It is widely used in electrical wiring, plumbing, and roofing. Copper is also an essential trace element in the human diet, playing a vital role in various biological processes. Gold is a yellow precious metal that is highly valued for its rarity and beauty. It is often used in jewelry, electronics, and as a form of currency. Gold is resistant to corrosion and tarnish, making it a popular choice for long-lasting items. Both copper and gold have significant economic and industrial importance.