Cobalt
Cobalt is a shiny, steel-gray metal with a melting point of 1495°C and a specific gravity of 8.9. It is relatively hard and brittle. Cobalt is ferromagnetic and is similar to iron and nickel in terms of hardness, tensile strength, machinability, thermodynamic properties, and electrochemical behavior. Metal cobalt is stable in humid air and water at normal temperatures and does not react with alkalis or organic matter. Oxidation occurs at high temperatures.
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