element
Information about Nobelium-249:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:249.087823±0.000365amu #
    Excess Mass (Δ):81.807000±0.340000MeV #
    Binding Energy:1848.153000±0.340000MeV #
"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.