Graphs (Also seen in GCSE Physics 1)
We can calculate the half-life from activity and number of nuclei graphs. Choose a starting value and then find how long it takes to fall to half this value. In the graphs we can see that both fall from 50 to 25 and take 5 hours to do this. Therefore the half-life is 5 hours. Knowing this we can then calculate the decay constant.
| Section 8 | Modes of Decay | |
|---|---|---|
| Lesson 4 | ||
| Learning Outcomes | To be able to sketch and label a graph of N against Z for stable and unstable nuclei | |
| To be able to state the changes to the parent nuclei when it undergoes: α decay, β- decay, β+ decay, | ||
| nucleon emission, electron capture and gamma ray emission | M.BENYOHAI |