calcium
Metal cannot be extracted from Gold, as Gold itself is a metal.
Among chief minerals extracted in Germany are zinc, salt and chloride of potash, aluminium, cadmium, iron ore, quick lime and hydrated lime, selenium and soda ash.
Two elements--calcium and oxygen--are present in quick lime.
CaO <-- this is also called as quick lime
Iron is extracted from haematite.
Aluminium is extracted from alumina.
Quick lime is calcium oxide. Washing soda is sodium carbonate.
Quick lime is a base. It reacts vigourously with water (hence the term "quick" living, as "quick and the dead") CaO + H2O -> CaOH + OH-
Calcium and oxygen (calcium oxide) are present in quick lime.
Calcium and oxygen (calcium oxide) are present in quick lime.
Lithium is extracted as the molten metal by a process of electrolysis.
copper