Source Copper metal does occur naturally, but by far the greatest source is in minerals such as chalcopyrite and bornite. From these ores and minerals copper is obtained by smelting, leaching and electrolysis. Uses The greatest percentage of copper used is in electrical equipment such as wiring and motors. Brass and bronze are both copper alloys and are extensively used. All American coins are now copper alloys, and gun metals also contain copper.
Copper sulphate is used widely as an agricultural poison and as an algicide in water purification.
Copper compounds such as Fehling. Biological Role Copper is an essential element although excess copper is toxic. General Information Copper is a good conductor of heat and electricity - hence its use in the electrical industry. It is resistant to air and water but slowly weathers to the green patina of the carbonate often seen on roofs and statues.