Question

what is the role of electronic configuration on writing periodic table

Answer 1

according to the modern periodic table the elements having same electronic configuration have the similar chemical properties

Answer 2

elements in the periodic table have a great role of electronic configuration. it helps to keep the similar elements in the same group or period .that is the valence electrons in the last shell will decide that in which category the element is..
K L M N
H 1
Li 2 1
Na 2 8 1

you can observe that in their electronic configuration the last shell is is having 1 electrons in it which make them similar....

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