Extraction of Low Reactivity Metals
Metals like copper, mercury, silver and gold are less reactive.
Metals at the bottom of the reactivity series can be obtained by heating their compounds. For example, when cinnabar (HgS) is heated in a furnace, it is reduced to metallic mercury.
Metals in the middle of the series like zinc, iron, nickel, tin, lead, etc., are reduced by a chemical reducing agent like carbon or carbon monoxide.