Question

How are elements arranged on the Periodic Table?

Answer 1

here is the ans of you question.......

in the periodic table elements are arranged on the basis of their increasing atomic number .

the elements having same number of valence electrons are placed in one group

and elements having same number of shells are placed in same period

there are eight period and 18 groups in the modern periodic table

hope this will help you

Answer 2

On the basis of increasing atomic no. Modern is based on that