[Jonty30]

Scientists think there is an island of stable elements further up the chart. Possibly stable enough to be useful.

[Salgak]

Of course, there are the areas of unstable elements as well.

Sarkeesium, Trigglypuffium, etc (grin)

[AdmSmith]

Scientists think there is an island of stable elements further up the chart. Possibly stable enough to be useful.

Yes, that would be very interesting. Nuclear physics is still an experimental science and there are no good, and practical, theories for calculating the behavior of heavy elements. Just approximate calculations that are uncertain.