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Cuadro de texto:   -  Atomic Mass: 222.0237260 ± 0.0000780 amu -  Excess Mass: 22100.000 ± 73.000 keV -  Binding Energy: 1698539.000 ± 73.000 keV -  Beta Decay Energy: B- -2183.000 ± 124.000 keV -  Half life: 2.9 ms -  Mode of decay: Alpha to Ac-218 º  Decay energy: 8.850 MeV -  Possible parent nuclides:    Alpha from Np-226