97-Bk-235  basic  element

97-berkelium-235 Atomic Mass: 235.0565800 +- 0.0004300 amu # Excess Mass: 52704.000 +- 401.000 keV # Binding Energy: 1768169.000 +- 401.000 keV # "The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.