Isotope Decay Calculator Ag-110mAm-241As-73As-74As-76As-77Au-198Au-199Ba-131Ba-133Ba-135mBa-137Bi-205Bi-206Bi-207Bi-212Br-82C-14Ca-45Ca-47Cd-109Cd-115Cd-115mCe-141Ce-144Cf-252Cl-36Cm-244Co-57Co-58Co-60Cr-51Cs-134Cs-137Cu-64Cu-67Dy-159Dy-165Dy-166Eu-152Eu-154Eu-155Eu-156F-18Fe-55Fe-59Ga-67Gd-153Gd-159Ge-68H-3Hg-197Hg-203Ho-166Ho-166mI-123I-125I-129I-131In-111In-113mIn-114mIn-115mIr-192K-42K-43Kr-85La-140Lu-177Lu-177mMg-28Mn-54Mo/Tc-99mNa-22Na-24Nb-95Ni-63Np-237P-32P-33Pb-203Pb-212Pd-103Pd-109Pm-149Po-210Pu-238Pu-239Pu-239Ra-224Ra-226Rb-86Re-186Re-186mRe-188Rh-105Rn-222Ru-103S-35Sc-46Sc-47Se-75Si-32Sm-153Sn-113Sr-85Sr-87mSr-89Sr-90Ta-182Tc-99Tc-99mTe-125mTh-232Tl-201Tl-204U-238V-48V-49W/Re-188W-181W-185W-187Xe-133Y-88Y-90Y-91Yb-169Yb-175Zn-65Zn-69m Month / Day / Year Hour : Minute Initial Date / / : Final Date / / : Time Elapsed YearsDaysHoursMinutes Half-Life YearsDaysHoursMinutes Initial Activity CimCiuCiBqkBqMBqGBqDPMDPS Red Data Required Final Activity CimCiuCiBqkBqMBqGBqDPMDPS Blue Data optional Green Data Computed