Untriunium

Untriunium, also known as element 131 or eka-Einstienium, is the possible chemical element in the periodic table with the placeholder symbol of Utu and atomic number 131. Untriunium and Utu are the temporary systematic IUPAC name and symbol, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to follow Untrinilium as the second element of the superactinides and the fourth element of the 8th period. Similarly to Untrinilium, it is expected to fall within the range of the island of stability

Untriunium Media

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  Pekka Pyykkö's 172-element (extended) periodic table.

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  Kulsha's first suggested form

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  Kulsha's second suggested form

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  Energy eigenvalues (in eV) for the outermost electrons of elements with Z = 100 through 172, predicted using Dirac–Fock calculations. The − and + signs refer to orbitals with decreased or increased azimuthal quantum number from spin–orbit splitting respectively: p− is p1/2, p+ is p3/2, d− is d3/2, d+ is d5/2, f− is f5/2, f+ is f7/2, g− is g7/2, and g+ is g9/2.

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  Energy eigenvalues for the 1s, 2s, 2p1/2 and 2p3/2 shells from solutions of the Dirac equation (taking into account the finite size of the nucleus) for Z = 135–175 (–·–), for the Thomas-Fermi potential (—) and for Z = 160–170 with the self-consistent potential (---).