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potassium
KCl - potassium salt in sea water
electrolysis of molten ore
sodium
NaCl - common salt
electrolysis of molten ore
calcium
CaCO3 - limestone
electrolysis of molten ore
magnesium
MgCO3 - magnesite
electrolysis of molten ore
aluminium
Al2O3 - bauxite
electrolysis of molten ore
zinc
ZnS - zinc blende
sulphide → oxide (heat in air)
oxide → metal (heat with charcoal)
iron
Fe2O3 - haematite
oxide → metal (heat with charcoal)
lead
PbS - galena
sulphide → oxide (heat in air)
oxide → metal (heat with charcoal)
copper
CuO - copper oxide
oxide → metal (heat with charcoal)
CuFeS2 - copper pyrite
sulphide → metal (heat in air)
mercury
HgS - cinnabar
sulphide → metal (heat in air)
silver
Ag2S - silver glance
sulphide → metal (heat)
Ag - free in nature
mechanical separation
platinum
Pt - free in nature
mechanical separation
gold
Au - free in nature
mechanical separation