Cobalt, the second word in Chinese, is pronounced as cobalt (G incarnation), a metallic element, with the symbol of Co, silvery white. In medicine, it can be used to make alloys and treat malignant tumors with radioactive cobalt (cobalt -60). ?

The English name "Cobalt" comes from Kobold in German, which means "bad elf". Because cobalt ore is toxic, miners and smelters often get sick at work, and cobalt also pollutes other metals. These bad effects used to be regarded as fairy pranks. Cobalt ore is mainly arsenide, oxide and sulfide. In addition, radioactive cobalt -60 can be used for cancer treatment.

A metallic element. Cobalt 60 is a radioactive isotope of cobalt, which is widely used in machinery, chemical industry, metallurgy and other aspects, and can replace radium for cancer treatment.

A hard silvery white bivalent and trivalent metallic element, magnetic, belonging to the same family as iron and nickel, usually coexisting with nickel or copper, or existing in the form of natural nickel-iron alloy (such as meteorites) or in the form of combined minerals; It is an essential trace element in animal and plant nutrients, and is used to produce wear-resistant and high-temperature resistant magnetic alloys and cemented carbides-element symbol Co.

Reference to the above content: Baidu Encyclopedia-Cobalt