Superactinides

The superactinides are elements with atomic numbers 121(unbiunnium(Ubu)) to 153(unpenttrium(Upt)). They are the furthest group in the Periodic table. As of 2021, none has been found. Scientists think they must have half-lives of only nanoseconds. The elements in this block are considered to be as g-block elements.

Superactinides Media

• 

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

• 

  Kulsha's first suggested form

• 

  Kulsha's second suggested form

• 

  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.

• 

  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 (---).