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  1. Cobalt - Wikipedia

  2. Cobalt - Element information, properties and uses | Periodic Table

  3. Cobalt | Uses, Properties, & Facts | Britannica

  4. Cobalt | Co (Element) - PubChem

  5. Cobalt (Co) - Periodic Table

  6. Cobalt (Co) - Periodic Table

  7. Cobalt Definition, Facts, Symbol, Discovery, Property, Uses

  8. Cobalt | History, Uses, Facts, Physical & Chemical Characteristics

  9. Cobalt Facts – Atomic Number 27 or Co - Science Notes and …

  10. Chemical Symbol for Cobalt – Co - Periodic Table of Elements