# Inner electrons 152 # Outer electrons 96 # Protons 248 An-Isotope 96:248 Approval Stats BE - Actual 1859.19 BE - Nucleon 7496.73 Decay A 91.61, SF 8.39 Element Curium Half Life 348000 Y Mass Actual 248.07 Mass Calculated 249.94 Mass H Norm 246.15 Stability Unstable