The sym bol | Z (p) N (n) | Isotope mass, (A.E.M.) The excitation energy | Half life [2] (T1/2) | Decay modes Of the nucleus | Spin and parity |
5Be | 4 1 | 5.04079 (429) |
| p | (1/2+)# |
7Be | 4 3 | 7.01692983 (11) | 53.22 (6) сут | ЕС | 3/2− |
10Be | 4 6 | 10.0135338 (4) | 1.51 × 106 year [6.8 (17) eV | β− | 0+ |