Can an element with atomic number 126, if discovered, be accommodated in the present set up of the long form of periodic table?
No, the maximum number of elements which can be accommodated in the present set up of the long form of the periodic table is 118. Thereafter, filling of 8r-orbital shall begin which will accommodate only two electrons. After 8r-orbitals, the filling of 5^-orbitals will begin. Since we do not have any provision for £-block elements in the present set up of the long form of periodic table, therefore, an element with atomic number 126, if discovered, cannot be accommodated in the present set up of the long form of periodic table.