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Radioactive Review
Half lives + Radioactive Decay
| Question | Answer |
|---|---|
| decrease in this can be used to date organic remains | C-14 |
| this remains the same in both living and dead organisms | C-12 |
| a change in the number of neutrons | isotope |
| a change in the number of protons | different element |
| having a longer half life | more stable |
| having a shorter half life | less stable |
| the result of 2 half lives | 25% remaining |
| the result of 3 half lives | 12.5% remaining |
| the result of 1 half life | 50% remaining |
| can be used to cause radioactive decay | alpha particles, beta particles, gamma rays |