Unit 10 Occurrence and extraction of metals

Bauxite

Bauxite - the common ore of copper and being  a mixture of hydrated aluminium oxide and impurities

Blast furnace

Blast furnace - a special furnace used for extracting iron from the ore

Cinnabar

Cinnabar - the ore of mercury and being a mixture of mercury(II) sulphide and impurities

Copper pyrite

Copper pyrite - the common ore of aluminium and being  a mixture of copper(II) iron(II) sulphide and impurities

Corrosion resistance

Corrosion resistance - the ability to resist corrosion

Electrolysis

Electrolysis - the process to use electricity to produce a chemical change

Haematite

Haematite - the common ore of iron and being  a mixture of iron(III) oxide and impurities

Recycling

Recycling - melting down used and scrap metals and use again

Reducing agent

Reducing agent - the species that causes reduction

Reduction

Reduction - the removal of oxygen from a metal oxide

Roasting

Roasting - the process converts sulphide ores to oxides by heating them in air 

Tensile strength

Tensile strength - the ability of a material to withstand a stretching force

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