Unbipentium

Unbipentium (), also known as -neptunium or element 125, is the temporary name of a hypothetical chemical element in the periodic table that has the temporary symbol Ubp and has the atomic number 125. Calculations have shown that Ubp would be the most stable isotope.
To date, no attempt has ever been made to synthesise unbipentium.
Name
The name unbipentium is used as a placeholder, such as in scientific articles about the search for the element. Transuranic elements beyond plutonium are always artificially produced, and usually end up being named for a scientist or the location of a laboratory that does work in atomic physics.
Unbipentium is of interest because it is within a range that has been predicted to be within a range of experimentally feasible "island of stability" elements based on a mean field theory based on a model of alpha decay. The self-coupling of the ω meson could be responsible for greater shell stability based earlier work, which suggested that self-coupling meson effects were stronger than originally predicted.

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