Cuadro de texto:   -  Atomic Mass: 20.9938467 ±  0.0000000 amu -  Excess Mass: -5731.720 ±  0.040 keV -  Binding Energy: 167405.965 ±  0.047 keV -  Beta Decay Energy: B- -3547.460 ±  0.701 keV -  Atomic Percent Abundance: 0.27% -  Spin: 3/2+ -  Stable Isotope -  Possible parent nuclides:                                             Beta from F-21                                             Electron capture from Na-21

 

 

 

 

 

 

 

 

 

 

 

 

 

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