Question

How does electronic configuration of an atom related to its position in the Modern periodic table? Give example

Answer 1

as the number of shells increase the period increase. Also as the number of valancy increase the group number increases.

Answer 2

The no of shell determines the period & no of valance electron determine the group
For eg
Calcium
Atomic no-20
electronic configuration-2,8,8,2
no of shell-4 therefore
Period - 4
valance electron-2 therefore
Group-2