Cobalt Symbol Co Atomic Number 27 Atomic Mass 58.9332 Family Group 9 (Viiib) Transition Metal Pronunciation CO-balt Overview Humans have been using compounds of cobalt since at least 1400 B.C. The compounds were used to color glass and glazes blue. In...

Cobalt is a grayish, hard, brittle metal closely resembling iron and nickel. These three metals are the only naturally magnetic elements on Earth. Cobalt exists in two allotropic forms that interconvert slowly. This property accounts for the fact that...

Cobalt is a transition metal, one of the elements that occurs in the middle of the periodic table, between Groups 2 and 13. It is located between iron and nickel, with whom it shares many common properties. Cobalt's atomic number is 27, its atomic mass...

Metallic chemical element, one of the transition elements, chemical symbol Co, atomic number 27. Widely dispersed in small amounts in many minerals and ores, this magnetic, silvery white metal with a faint bluish tinge is used mostly for special alloys...

Cobalt (pronounced /ËkoÊbÉ'lt/) is a hard, lustrous, silver-grey metal, a chemical element with symbol Co. It is found in various ores, and is used in the preparation of magnetic, wear-resistant, and high-strength alloys. Its compounds are used in the...