Gold: A soft metal with a characteristic yellow colour. It is chemically unreactive, although it will dissolve in aqua regia (a mixture of nitric and hydrochloric acids) Curium: silvery metallic, glows purple in the dark Copper: A reddish-gold metal that is easily worked and drawn into wires Cobalt: A lustrous, silvery-blue metal. It is magnetic Empowering you to successs