Read all of Chapter 8!
1. Problem 8.7.E.
2. Problem 8.8.E.
3. Problem 8.14.I.
4. Problem 8.15.I. Use these values for the halflives of 238U (4.47 Gyr) and 235U (0.704 Gyr).
| Carbonaceous Chondrite | Meteorite X | |
| 238U | 66 | 66 |
| 235U | 22 | 22 |
| 204Pb | 22 | 22 |
| 206Pb | 22 | 22 |
| 207Pb | 22 | 22 |
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