Extended periodic table

Scientists are trying to make new chemical elements that do not exist yet. In this way, they will extend (make longer) the periodic table. As of 2022, the element with the highest atomic number is oganesson, element 118. Scientists have tried to make atoms with higher atomic numbers, by smashing smaller atoms together. Scientists have also made predictions about how to make these atoms. There is probably a biggest possible atomic number for any atom. Atoms with a higher atomic number than this cannot exist. However, scientists are not sure what this number is.
Layout.
The extended periodic table is a version of the periodic table that is longer than the normal one. The inner transition metals are placed between Group 2 and Group 3 on the periodic table. On a normal periodic table the inner transition metals are below Groups 2 and 3. 
Naming of elements.
Each of these predicted elements can be given a name. These names are based on the digits of the atomic number. They were set by IUPAC, and come from Latin and Greek.
The chemical name and symbol come from these put together, followed by "ium" or "um". For example, element 138 is called "untrioctium" and has symbol Uto.
An element can also be named by "eka-" followed by the element above it in the periodic table. For example, ununennium can also be called "eka-francium".
Predictions.
Pekka Pykkö has predicted how atomic orbitals will fill up as atomic number increases. According to this model, element 172 should be the end of the row that starts with element 119.