Question

based on electronic configuration how will you identify the first and last element of a period

Answer 1

it depends on what you are studying
if you are in 9th class you will be asking KLMN shells
but if you are above 9th than you are asking spdf blocks and quantum electronic configuration


KLMN-you wold see no. of electrons in valace shell if it's 1 then it's first and if it's 8 then it is last

but with quantum one you have to take care of overlapping electrons

hope it helps
plz Mark as brainliest

Answer 2

They.. buddy. if the no of electrons are more than no of shells also increased and no of shells decides the position of elemnt in the period..!! KLMN are the simpl. way to place elctron. :)