| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 52Cu | 29 | 23 | 3 | |
| 53Cu | 29 | 24 | -3/2 | |
| 54Cu | 29 | 25 | 3 | |
| 55Cu | 29 | 26 | -3/2 | |
| 56Cu | 29 | 27 | 4 | |
| 57Cu | 29 | 28 | -3/2 | |
| 58Cu | 29 | 29 | 1 | |
| 59Cu | 29 | 30 | -3/2 | |
| 60Cu | 29 | 31 | 2 | |
| 61Cu | 29 | 32 | -3/2 | |
| 62Cu | 29 | 33 | 1 | |
| 63Cu | 29 | 34 | -3/2 | Stable |
| 64Cu | 29 | 35 | 1 | |
| 65Cu | 29 | 36 | -3/2 | Stable |
| 66Cu | 29 | 37 | 1 | |
| 67Cu | 29 | 38 | -3/2 | |
| 68mCu | 29 | 39 | -6 | |
| 68Cu | 29 | 39 | 1 | |
| 69Cu | 29 | 40 | -3/2 | |
| 69mCu | 29 | 40 | 13/2 | |
| 70m1Cu | 29 | 41 | -3 | |
| 70Cu | 29 | 41 | -6 | |
| 70m2Cu | 29 | 41 | 1 | |
| 71mCu | 29 | 42 | -19/2 | |
| 71Cu | 29 | 42 | -3/2 | |
| 72Cu | 29 | 43 | 1 | |
| 72mCu | 29 | 43 | -4 | |
| 73Cu | 29 | 44 | -3/2 | |
| 74Cu | 29 | 45 | -1 | |
| 75Cu | 29 | 46 | -3/2 | |
| 76Cu | 29 | 47 | 5 | |
| 77Cu | 29 | 48 | -3/2 | |
| 78Cu | 29 | 49 | -2 | |
| 79Cu | 29 | 50 | -3/2 | |
| 80Cu | 29 | 51 | 0 |