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    Co

    Cobalt

    Transition Metal

    Atomic Number: 27 • Atomic Mass: 58.9330 u • Period: 4 • Group: 9

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷
    Phase: Solid
    Electronegativity: 1.88
    Iron (Fe)Nickel (Ni)
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    Occurrence

    Cobalt is found in various natural sources, including minerals, rocks, and the Earth's crust.

    • Relatively rare, comprising about 0.0029% of Earth's crust
    • Usually found in association with nickel, silver, lead, copper, and iron ores
    • Major minerals include cobaltite, erythrite, and skutterudite
    • Large deposits in Democratic Republic of Congo and other parts of Africa
    • Also found in meteorites