element
Information about Chlorine-50:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:50.007730±0.000970amu #
    Excess Mass (Δ):7.200000±0.904000MeV #
    Binding Energy:383.066000±0.904000MeV #
    β- Decay Energy:20.297000±1.142000MeV #
"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.