  In this work, we have used the liquid-drop model in the context of stabilized
jellium model, to study the stability of $Z$-ply charged metal clusters of
different species against fragmentation. We have shown that on the one hand,
singly ionized clusters are stable against any spontaneous fragmentation, and
on the other hand, the most favored decay process for them is atomic
evaporation. However, multiply charged clusters of sufficiently small sizes may
undergo spontaneous decay via fission processes. Comparing the results for
different species show that for fixed $N$, the lower electron density metal
clusters can accommodate more excess charges before their Coulomb explosions.
This comparison also shows that, for fixed $Z$, the atomic evaporation which is
the most favored decay mechanism for sufficiently large clusters, takes place
at lower $N$s for lower electron density clusters.
