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...Occurrence of metals and non out the naturally occuring elements are about nonmetals some show properties both they called metalloids only like gold silver platinum etc found in free state most combined states as oxides sulphides carbonates silicates helium neon argon sulphur phosphorus metallurgy is science extraction from their ores purification minerals substances containing one or more compounds ore a mineral which can be extracted profitably metallurgical processes consists three main steps i concentration ii reduction iii refining removal impurities process obtaining metal its compound impure to obtain pure physical solids except may mercury liquids gases hard sodium potassium brittle diamond hardest have metallic lustre do not dull luster high melting points low boliling malleable made into thin sheets ductile wires good conductors heat electricity bad graphite sonorus produces sound chemical reaction with oxygen react form these basic because water bases eg magnesium burns air ...