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Cuadro de texto:   -  Atomic Mass: 242.0629250 ± 0.0002150 amu -  Excess Mass: 58614.000 ± 201.000 keV -  Binding Energy: 1822669.000 ± 201.000 keV -  Beta Decay Energy: B- 1201.000 ± 288.000 keV -  Spin: 0+ -  Half life: 16.8 min -  Mode of decay: Beta to Np-242