Description of copper

Appeared purple shiny copper metal, copper metal is one of the earliest human beings found, is one of the best pure metal,very tough, abrasion-resistant. There are good ductility, good thermal and electrical conductivity. Copper and some of its alloys have good corrosion resistance, in the dry air is very stable. However, in humid air can be generated in the surface layer of green copper carbonate hydroxide, is called verdigris. Soluble in hot concentrated nitric acid and sulfuric acid, slightly soluble in hydrochloric acid. Easy base erosion.