Question

How were the elements arranged in the long form of thr modern periodic table?

Answer 1

Long Form of Periodic Table. The long form of the periodic table is based upon the electronic configuration of the elements. It is the present form or the modern periodic table of elements. ... It keeps all the elements with similar electronic configuration under each other in the same vertical column.

Answer 2

the elements arranged in the long form of thr modern periodic table are according to group and period with atomic number and mass number (periodicity) .