Cobalt belongs to the chemical elements belonging to group 9 i.e. transition elements. Rhodium, iridium and mietnerium are other members of group IX of the periodic table. Occurrence of Cobalt: In the earth’s crust cobalt is usually found in chemically combined state. It is a free element that is produced through reductive smelting. Cobalt’s stable state is formed in supernovas while due to oxygen and chlorine free cobalt is not found on the earth. They both prevent the formation of free cobalt. All the amounts of cobalt can also be found in many animals, plants, soils and rocks. In the
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