Question

How is the electron configuration related to the arrangement of elements in the periodic table?

Answer 1

The number of groups determine the valence electron ans period number determines the number of shells...

for instance take an elememt calcium

it is placed in 2 group in period 4

so we can guess its electronic configuration

It has 2 valence electrons and 4 shells

E.C

K L M N

2 8 8 2

HOPE IT HELPS....