# Inner electrons 157 # Outer electrons 102 # Protons 259 An-Isotope 102:259 Approval Stats BE - Actual 1916.59 BE - Nucleon 7399.97 Decay A 75, EC+B+ 25, SF 10 Element Nobelium Half Life 58 m Mass Actual 259.10 Mass Calculated 261.03 Mass H Norm 257.09 Stability Unstable
