HALF LIFE is the AVERAGE TIME it takes for the NUMBER OF NUCLEI in a RADIOACTIVE ISOTOPE SAMPLE to HALVE
- Each time a decay happens and an alpha, beta or gamma is given out, it means one more radioactive nucleus has disappeared.
- Obviously, as the unstable nuclei all steadily disappear, the activity will decrease. So the older a sample becomes, the less radiation it will emit.
- The problem with trying to…