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Cobalt · chemical symbol

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Cobalt has 27 protons in every atomic nucleus. Changing that number would make a different element. Source: Cobalt ↗

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  1. 28Nickel · chemical symbolRECALL
    Ni

    Atomic number 28

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  2. 29Copper · chemical symbolRECALL
    Cu

    Atomic number 29

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  3. 30Zinc · chemical symbolRECALL
    Zn

    Atomic number 30

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