| k | Calculated ½ life (17) | isotope | nber bonds δ" cal. For isot. | Observed ½ life | decay | % dev. from mean value (0% = mean value; 100% = possible limite value) |
| 1 | (726 s) | |||||
| 2 | (5.27 × 105 s) | |||||
| 3 | 0.48 to 12.88 × 108 s (3.83 × 108 s) | 22890Th | 5.49 | 0.60 × 108 s | α | −92.2% |
| 85Kr | 6 | 3.4 × 108 s | β− | −4.75% | ||
| 3H | 5.49 | 3.88 × 108 s | β− | 0.5% | ||
| 154Eu | 5.49 | 5.04 × 108 s | β− | 13.4% | ||
| 22789Ac | 5.04 | 6.8 × 108 s | β− (98.6%) | 32.8% | ||
| 210Pb | 4 | 7.03 × 108 s | β− | 35.4% | ||
| 90Sr | 6 | 9.07 × 108 s | β− | 58% | ||
| 23292U | 5.61 | 22 × 108 s | α | 201% | ||
| 20984Po | 5.38 | 32.5 × 108 s | α (99.5%) | 317% | ||
| 4 | 0.17 to 14.01 × 1011 s (2.78 × 1011 s) | 22688Ra | 4.94 | 0.51 × 1011 s | α or β−β− | −69% |
| 14C | 6 | 1.8 × 1011 s | β− | −37.5% | ||
| 22990Th | 4.06 | 2.32 × 1011 s | α | −8.80% | ||
| 23191Pa | 5.27 | 10.34 × 1011 s | α | 67% | ||
| 23090Th | 5.25 | 23.8 × 1011 s | α | 187% | ||
| 5 | 0.63 to 152 × 1013 s (20.17 × 1013 s) | 23392U | 4.45 | 0.5 × 1013 s | α | −1.04 |
| 99Tc | 7 | 0.66 × 1013 s | β− | −99% | ||
| 12650Sn | 6.32 | 0.73 × 1013 s | β− | −97% | ||
| 23492U | 5.29 | 0.77 × 1013 s | α | −96% | ||
| 36Cl | 7 | 0.95 × 1013 s | β− | −91% | ||
| 79Se | 5.38 | 1.03 × 1013 s | β− | −89.7% | ||
| 20883Bi | 5.32 | 1.16 × 1013 s | β+ | −87% | ||
| 10Be | 5 | 4.76 × 1013 s | β− | −50% | ||
| 93Zr | 5.20 | 4.82 × 1013 s | β− | −49.7% | ||
| 15064Gd | 6.72 | 5.64 × 1013 s | α (β−β− rare) | −45% | ||
| 135Cs | 6.77 | 7.25 × 1013 s | β− | −37% | ||
| 15466Dy | 7.20 | 9.45 × 1013 s | α (β−β− rare) | −28% | ||
| 98Tc | 5.6 | 14.7 × 1013 s | β− | −12.3% | ||
| 10746Pd | 5.05 | 20.48 × 1013 s | β− | 0.24% | ||
| 18272Hf | 5.19 | 28 × 1013 s | β− | 5.9% | ||
| 12943I | 6.82 | 49.4 × 1013 s | β− | 22.2% | ||
| 23692U | 5.06 | 73.9 × 1013 s | α | 40.7% | ||
| 9241Nb | 6.09 | 109.3 × 1013 s | β+ (99%) | 67.6% | ||
| 6 | 0.23 to 166 × 1016 s (14.64 × 1016 s) | 146Sm | 6.50 | 0.32 × 1016 s | α | −94% |
| 23592U | 4.09 | 2.22 × 1016 s | α | −54% | ||
| 40K | 6 | 4.02 × 1016 s | β− | −38.7% | ||
| 23892U | 4.75 | 20.41 × 1016 s | α | 3.8% | ||
| 23290Th | 4.97 | 44.2 × 1016 s | α | 19.5% | ||
| 17671Lu | 4.86 | 121 × 1016 s | β− | 70% overlap | ||
| 18775Re | 5.68 | 130 × 1016 s | β− (99%) | 76% overlap | ||
| 7 | 83 × 1016 to 180 × 1019 s (10.6 × 1019 s) | 8737 Rb | 7.6 | 151 × 1016 s | β− overlap | −91% if k = 7 or +90%if k = 8 |
| 13857La | 5.79 | 3.2 × 1018 s | β+β− | −78% | ||
| 147Sm | 4.90 | 0.5 × 1019 s | α | −71% | ||
| 190Pt | 6.88 | 20.48 × 1018 s | α | −42% | ||
| 8 | 30 × 1019 to 196 × 1022 s (7.71 × 1022 s) | 15264Gd | 6.63 | 0.34 × 1022 s | α | −64.6% |
| 115In | 7 | 1.39 × 1022 s | β− | −38.6% | ||
| 59 Co | 8 | 1.61 × 1022 s | stable | −35.6% | ||
| 18676Os | 6.38 | 6.30 × 1022 s | α | −5% | ||
| 17472Hf | 6.57 | 6.3 × 1022 s | α | −5% | ||
| 4460Nd | 6.04 | 7.21 × 1022 s | α | −1.7% | ||
| 11348Cd | 5.05 | 24.26 × 1022 s | β− | 8.8%: overl. with k = 9 | ||
| 148Sm | 6.29 | 25.2 × 1022 s | α | 9.3%: overl. With k = 9 | ||
| 9 | 11 × 1022 to 214 × 1025 s (5.60 × 1025 s) | 50V | 7.2 | 0.44 × 1025 s | β+ (83%) β− (17%) | −7.8% |
| 18074W | 6.50 | 5.65 × 1025 s | α | 0.02% overlap | ||
| 151Eu | 6.13 | 15.2 × 1025 s | α | 3.8% for these 7 | ||
| 15060Nd | 5.7 | 21.1 × 1025 s | β−β− | 6.2% elements | ||
| 10042Mo | 6.4 | 26.78 × 1025 s | β−β− | 8.5% with k = 10 | ||
| 20983Bi | 5.76 | 60.0 × 1025 s | α | 21.7% | ||
| 96Zr | 6.06 | 63 × 1025 s | β−β− | 23% | ||
| 11648Cd | 6.72 | 97.7 × 1025 s | β−β− | 36% | ||
| 10 | 4 × 1025 to 232 × 1028 s (4.06 × 1028 s) | 48Ca | 7.68 | 0.13 × 1028 s | β−β− | −58% |
| 82Se | 7.16 | 0.306 × 1028 s | β−β− | −45.6% | ||
| 130Te | 6.50 | 2.48 × 1028 s | β−β− | −0.7% overlap | ||
| 136Xe | 6.24 | 6.62 × 1028 s | β−β− | 1.1% with k = 11 | ||
| 11 | 1.4 × 1028 to 253 × 1031 s (2.95 × 1031 s) | 128Te | 6.78 | 6.93 × 1031 s | β−β− | 1.6% |