| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 21Al | 13 | 8 | 1/2 | |
| 22Al | 13 | 9 | 3 | |
| 23Al | 13 | 10 | 5/2 | |
| 24mAl | 13 | 11 | 1 | |
| 24Al | 13 | 11 | 4 | |
| 25Al | 13 | 12 | 5/2 | |
| 26Al | 13 | 13 | 5 | |
| 26mAl | 13 | 13 | 0 | |
| 27Al | 13 | 14 | 5/2 | Stable |
| 28Al | 13 | 15 | 3 | |
| 29Al | 13 | 16 | 5/2 | |
| 30Al | 13 | 17 | 3 | |
| 31Al | 13 | 18 | 3/2 | |
| 32mAl | 13 | 19 | 4 | |
| 32Al | 13 | 19 | 1 | |
| 33Al | 13 | 20 | 5/2 | |
| 34Al | 13 | 21 | -4 | |
| 35Al | 13 | 22 | 5/2 | |
| 36Al | 13 | 23 | 1 | |
| 37Al | 13 | 24 | 3/2 | |
| 38Al | 13 | 25 | 2 | |
| 39Al | 13 | 26 | 3/2 | |
| 40Al | 13 | 27 | 1 | |
| 41Al | 13 | 28 | 3/2 | |
| 42Al | 13 | 29 | 0 |