Written by the Fiveable Content Team โข Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated August 2025
Definition
Cobalt is a chemical element with the symbol Co and atomic number 27. It's an essential trace mineral used by animals in making Vitamin B12, which is important for nerve function.