| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 212Pa | 91 | 121 | 7 | |
| 213Pa | 91 | 122 | -9/2 | |
| 214Pa | 91 | 123 | -4 | |
| 215Pa | 91 | 124 | -9/2 | |
| 216Pa | 91 | 125 | -3 | |
| 217Pa | 91 | 126 | -9/2 | |
| 217mPa | 91 | 126 | 29/2 | |
| 218Pa | 91 | 127 | -3 | |
| 219Pa | 91 | 128 | -9/2 | |
| 220Pa | 91 | 129 | -1 | |
| 221Pa | 91 | 130 | -9/2 | |
| 222Pa | 91 | 131 | -4 | |
| 223Pa | 91 | 132 | -7/2 | |
| 224Pa | 91 | 133 | -5 | |
| 225Pa | 91 | 134 | -5/2 | |
| 226Pa | 91 | 135 | -3 | |
| 227Pa | 91 | 136 | -5/2 | |
| 228Pa | 91 | 137 | 3 | |
| 229Pa | 91 | 138 | 5/2 | |
| 229mPa | 91 | 138 | -3/2 | |
| 230Pa | 91 | 139 | -2 | |
| 231Pa | 91 | 140 | -3/2 | |
| 232Pa | 91 | 141 | -2 | |
| 233Pa | 91 | 142 | -3/2 | |
| 234mPa | 91 | 143 | 0 | |
| 234Pa | 91 | 143 | 4 | |
| 235Pa | 91 | 144 | -3/2 | |
| 236Pa | 91 | 145 | -1 | |
| 237Pa | 91 | 146 | 1/2 | |
| 238Pa | 91 | 147 | -3 | |
| 239Pa | 91 | 148 | -3/2 | |
| 240Pa | 91 | 149 | 0 |