Radioactive Half-Life
The radioactive half-life for a given radioisotope is the time for half the radioactive nuclei in any sample to undergo radioactive decay. After two half-lives, there will be one fourth the original sample, after three half-lives one eight the original sample, and so forth.
| More on graph | More on half-life discussion | Calculation |
| Development of half-life expression |
| Radioactive decay as a clock |
| NIST Table of Halflives |
| HyperPhysics***** Nuclear | R Nave |
