unstable
the antonym of stable is unstable
It really isn't elements that are stable or unstable, but isotopes. Carbon has both stable and unstable isotopes.
yes
Helium 4 is very stable. Helium 6 is unstable.
is peru government stable or unstable
unstable
stable
It is stable
stable
phosphorus is not stable
Chlorine is stable.
cuba is stable
the antonym of stable is unstable
stable
unstable, think about it.
Unstable.