Which Example Represents the Oxidation Half-Reaction for Cobalt/cobalt(II)?
A) Co $\rightarrow$

Which example represents the oxidation half-reaction for cobalt/cobalt(II) ?

A) Co $\rightarrow$ Co²⁺ + 2 e^-
B) Co + 2 e^- $\rightarrow$ Co^2-
C) Co²⁺ + 2 e^- $\rightarrow$ Co
D) Co²⁺ $\rightarrow$ Co + 2 e^-