109-Mt-265  basic  element

109-meitnerium-265 Atomic Mass: 265.1365670 +- 0.0005000 amu # Excess Mass: 127211.000 +- 466.000 keV # Binding Energy: 1926413.000 +- 466.000 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.