Cadmium occurs in small quantities in zin ores and is obtained as a by product from mining copper and zinc. Cadmium was discovered by Friedrich Stromeyer in 1817 through his work on Zinc oxide. Heating Zinc carbonate produced a yellow/orange substance when zinc oxide should be white. He extracted the unknown metal from the metal oxide and isolated Cadmium metal. It is named after the Latin ‘Cadmia’ the old name for the zinc ore it is found in. Cadmium is used in the production of batteries, especially rechargeable nickel-cadmium batteries. It is also used in alloy production where it can be used to lower the melting point of other metals. It is located in Group 12 as a Transition metal. It has a melting point of 321°c and a boiling point of 765°c.
Used in nickel-cadmium batteries. Also in electroplating steel and in the manufacture of berings. Its compounds are found in paint pigments and a wide variety of intense colors. Boiling cadmium gives off a weird, yellow-colored vapor that is poisonous.
Obtained as a by product of zinc refining.