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#REDIRECT ] |
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{{Redirect|Ubp|other uses|Ubp (disambiguation)}} |
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{{Infobox unbipentium}} |
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'''Unbipentium''', also known as '''element 125''' or '''eka-neptunium''', is the hypothetical chemical element with ] 125 and placeholder symbol Ub5. ''Unbiseptium'' and ''Ubp'' are the temporary ], respectively, until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table, unbihexium is expected to be a g-block superactinide and the eighth element in the 8th ]. Unbihexium has attracted attention among nuclear physicists, especially in early predictions targeting properties of superheavy elements, for 125 may be a ] of protons near the center of an ], leading to longer half-lives, especially for <sup>332</sup>Ubp or <sup>354</sup>Ubh which may also have magic numbers of neutrons.<ref name=SHquest /><!--this wording is inconsistent but Ubp was predicted to lie near the peak--> |
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Early interest in possible increased stability led to the first attempted synthesis of unbipentium in 2010 and searches for it in nature in subsequent years. Despite several reported observations, more recent studies suggest that these experiments were insufficiently sensitive; hence, no unbipentium has been found naturally or artificially.<ref name=Transuraniumppl /> Predictions of the stability of unbihexium vary greatly among different models; some suggest the island of stability may instead lie at a lower atomic number, closer to ] and ]. |
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Unbipentium is predicted to be a chemically active superactinide, exhibiting a variety of oxidation states from +1 to +8, and possibly being a heavier ] of . It is predicted to be the first element with an electron in a g ], a consequence of ] seen only in heavy and superheavy elements. An overlap in energy levels of the 5g, 6f, 7d, and 8p orbitals is also expected, which complicates predictions of chemical properties for this element. |
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