Precision electrical-resistivity measurements around the N\'eel temperature, ${T}_{N}$, of three samples of polycrystalline chromium with different thermal histories are reported. The critical exponent of $\frac{d\ensuremath{\rho}}{\mathrm{dT}}$ below ${T}_{N}$ is found to be 0.65 \ifmmode\pm\else\textpm\fi{} 0.05 over temperature ranges that are sample dependent. Thus, the Suezaki-Mori theory for the resistivity of an antiferromagnet predicting the dominant behavior below ${T}_{N}$ is confirmed. However, above ${T}_{N}$, our data cannot be fit into any meaningful power law.