iateshaggy said:

all of the elements that have one iota of significance are there.  any elements more dense that the elements we have already discovered/made can only exist for 1/1000 of a second before decaying into less dense elements.

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While this has been the case so far, some scientists theorize that there is an "Island of Stability" that they are approaching by making heavier and heavier nuclei.  Pretty interesting stuff.

Quote:

# ^178m2Hf has the highest excitation energy of any comparably long-lived isomer. One gram of pure Hf-178-m2 would contain approximately 1300 megajoules of energy, the equivalent of exploding about 226 kilograms (500 pounds) of TNT. The half-life of Hf-178-m2 is 31 years or 1 Gs (gigasecond, 1,000,000,000 seconds) so that a gram's natural radioactivity is 1.6 TBq (terabecquerels) or roughly 40 Ci (curies). The activity is in a cascade of penetrating gamma rays, the most energetic of which is 0.574 MeV. Substantial shielding is needed before it is safe for people to be around.
# All of the energy released would be in the form of photons of X-rays and gamma rays.
# Discussions also indicate that the energy might be released very quickly, so that Hf-178-m2 could produce extremely high powers (on the order of exawatts).

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Wiccan_Seeker said:

Picture batteries with a capacity of tens of thousands of batteries.

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