Gold

__**Gold**__ Symbol: Au atomic number : 79 electronic configuration: 2.8.18.32.18.1 Gold is a precious tranistion metal that is usually found in the solid state. Compared with other metals, pure gold is chemically least reactive, resisting individual acids but being attacked by the acid mixture aqua regia, so named because it dissolves gold. Gold also dissolves in alkaline solutions of cyanide, which have been used in mining. Gold dissolves in mercury, forming amalgam alloys. Gold is insoluble in nitric acid, which dissolves silver and base metals, a property that has long been used to confirm the presence of gold in items, and this is the origin of the colloquial term "acid test", referring to a gold standard test for genuine value.

Gold is also often found in daily lives, especially used in jewellery. Gold being malleable and soft, is often mixed with other metals such as steel to form alloys that are less malleable. This minimizes denting of jewellery (i.e necklace, bracelets, rings etc)