| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 22Si | 14 | 8 | 0 | |
| 23Si | 14 | 9 | 3/2 | |
| 24Si | 14 | 10 | 0 | |
| 25Si | 14 | 11 | 5/2 | |
| 26Si | 14 | 12 | 0 | |
| 27Si | 14 | 13 | 5/2 | |
| 28Si | 14 | 14 | 0 | Stable |
| 29Si | 14 | 15 | 1/2 | Stable |
| 30Si | 14 | 16 | 0 | Stable |
| 31Si | 14 | 17 | 3/2 | |
| 32Si | 14 | 18 | 0 | |
| 33Si | 14 | 19 | 3/2 | |
| 34Si | 14 | 20 | 0 | |
| 35Si | 14 | 21 | -7/2 | |
| 36Si | 14 | 22 | 0 | |
| 37Si | 14 | 23 | -7/2 | |
| 38Si | 14 | 24 | 0 | |
| 39Si | 14 | 25 | -7/2 | |
| 40Si | 14 | 26 | 0 | |
| 41Si | 14 | 27 | -7/2 | |
| 42Si | 14 | 28 | 0 | |
| 43Si | 14 | 29 | -3/2 | |
| 44Si | 14 | 30 | 0 |