Extrapolation properties of the droplet model

In previous work it was found that the droplet model of nuclear masses has surprisingly small uncertainties when used to predict masses in the region near Z= 184. We study to what extent this conclusion is modified if additional terms are included. The result is that variations of the order of 100 MeV in the binding energy require terms of very high power in Z or A, i.e. showing essentially a threshold behaviour.