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Almost each and each metal on this earth is looked upon as a strong and stable cloth. But even after that the amazing surroundings influences these metals as nicely. Prolonged exposure to the air can cause the technique of rusting in iron. Similarly copper too is liable to such changes and due to this motive it develops a inexperienced patina. The purpose for the equal is that the oxygen from the air leads to the formation of the patina. What is copper? Copper is a reddish brown chemical detail intently related to gold and silver. Copper is a malleable steel and as a consequence is used for making cash, utensils, and so on. It is also enormously conductive in nature and conducts warmth and power equally properly. It is also one of the oldest metals to be determined and used by the human race. What is the reason for copper turning inexperienced? It is due to the oxidation process of copper that it turns inexperienced. When left exposed to air and water, it ends in the formation