Zinc (\( \text{Zn} \)) in the 3d transition series is characterized by a lower oxidation state. Unlike other transition elements that frequently display variable oxidation states owing to their incompletely filled \( d \)-orbitals, zinc possesses a fully occupied \( d^{10} \)-orbital configuration.
Electronic Configuration of Zn: \[\text{Zn: } [\text{Ar}] 3d^{10} 4s^2\]As its \( 3d \)-orbitals are completely filled, zinc generally exhibits an oxidation state of \( +2 \). This is a consequence of losing its two \( 4s \)-electrons, resulting in an oxidation state that is lower than that of other elements in the 3d series. Conclusion: Zinc displays the lowest oxidation state relative to other elements in the 3d series.