The daughter product may also be radioactive, and may decay into another product.
| Parent | Daughter | Half Change in... |
| Carbon-14 | Nitrogen-14 | 5730 years |
| Uranium-235 | Lead-207 | 704 million years |
| Uranium-238 | Lead-206 | 4,470 million years |
| Potassium-40 | Argon-40 | 1,280 million years |
| Thorium-232 | Lead-208 | 14,010 million years |
| Rubidium-87 | Strontium-87 | 48,800 million years |