Mendelevium-256m

• β⁺→Fermium-256
• α→Einsteinium-252
• SF

Decay chain

1. MdMendelevium-256Z 101 · N 1551.67 h
2. β⁺
   FmFermium-256Z 100 · N 1562.62 h
3. α8.1%
   CfCalifornium-252Z 98 · N 1542.65 y
4. α96.897%
   CmCurium-248Z 96 · N 152348.0 ky
5. α91.61%
   PuPlutonium-244Z 94 · N 15081.3 My
6. α99.877%
   UUranium-240Z 92 · N 14814.1 h
7. β⁻100%
   NpNeptunium-240Z 93 · N 1471.03 h
8. β⁻100%
   PuPlutonium-240Z 94 · N 1466.56 ky
9. α~100%
   UUranium-236Z 92 · N 14423.42 My
10. α~100%
    ThThorium-232Z 90 · N 14214.0 Gy
11. α~100%
    RaRadium-228Z 88 · N 1405.75 y
12. β⁻100%
    AcActinium-228Z 89 · N 1396.15 h
13. β⁻100%
    ThThorium-228Z 90 · N 1381.91 y
14. α~100%
    RaRadium-224Z 88 · N 1363.63 d
15. α~100%
    RnRadon-220Z 86 · N 13455.6 s
16. α100%
    PoPolonium-216Z 84 · N 132144.0 ms
17. α100%
    PbLead-212Z 82 · N 13010.63 h
18. β⁻100%
    BiBismuth-212Z 83 · N 1291.01 h
19. β⁻64.046%
    PoPolonium-212Z 84 · N 128294.4 ns
20. α100%
    PbLead-208Z 82 · N 126Stable