Gold

Description

✓ Verified
0
Gold is a chemical element with the symbol Au and atomic number 79, classified as a transition metal. In its purest form, it is a bright, slightly reddish-yellow, dense, soft, malleable, and ductile metal, making it one of the least reactive chemical elements known, remaining largely resistant to most acids. Gold has been a highly coveted precious metal used for coinage, jewelry, and other art throughout recorded history, and its currency value derives from its relative rarity, uniform quality, ease of transportability, resistance to corrosion, and other unique properties. A total of around 244,000 tonnes of gold are estimated to have been mined throughout human history, most of it still in circulation in some form. Historically, gold coinage was widely used as currency, and before the mid-20th century, gold-backed monetary systems anchored the value of paper money in many nations. Beyond ornamentation and finance, gold has practical applications in dentistry, electronics, and aerospace engineering due to its excellent conductivity and resistance to tarnish, and it continues to be pursued through both traditional mining and modern extraction techniques such as cyanide leaching.