Fricke et al. also predicted the extended periodic table up to 172.

For period 8, which includes elements which may be synthesized after 2012, see the extended periodic table.

The extended periodic table is a version of the periodic table that is longer than the normal one.

(See also extended periodic table (large version).)

In the extended periodic table, suggested by Glenn T. Seaborg in 1969, yet unknown elements are included up to atomic number 218.

According to Seaborg's extended periodic table of elements, elements 122 and 124 are placed as eka-Thorium and eka-Uranium respectively.