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What is the actual meaning of electrode potential of $\ce{Cu^2+}$/$\ce{Cu}$ having a positive value? Does that mean that the reaction (i.e. $\ce{Cu^2+ + 2e- -> Cu}$) will want to happen more vigorously than the elements having a negative value or is it the other way round?

From my understanding, since the configuration of $\ce{Cu^2+}$ is $[\ce{Ar}]\mathrm{3d^{9}}$ and the configuration of $\ce{Cu}$ is $[\ce{Ar}]\mathrm{3d^{10}4s^{1}}$, the reaction will happen more vigorously than others with a negative value becuase the end product has a fully filled d-subshell and should be more stable.

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