Einsteinium-253 (Es-253)
Identity
- Protons
- 99
- Neutrons
- 154
- Mass number
- 253
- Mass
- 253.1 ± 1.3 u
- Mass excess
- 79.010 MeV
- Spin
- 7/2+*
Stability
Half-life: 20.5 days
Natural occurrence
Not found in nature
Decays to
- alpha 100.0 % Bk-249
- spontaneous fission 0.0000087 %