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    cobalt (Co)

    cobalt
    Cobalt. Credit: RTC, Wikipedia
    A hard, brittle, metallic element found associated with nickel, silver, lead, copper, and iron ores and resembling nickel and iron in appearance. It is used chiefly for magnetic alloys, high-temperature alloys, and in the form of salts for blue glass and ceramic pigments.


    atomic number 27
    relative atomic mass 58.933
    electronic configuration 1s22s22p63s23p64s23d7
    main oxidation states +2, +3
    relative density 8.9
    melting point 1,495 °C (2,723 °F)
    boiling point 3,100 °C (5,612 °F)


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