Question

what is the similarity in the electronic configuration of MG CA and SR

Answer 1

these have same valence electron

Answer 2

Magnesium, calcium, potassium as well as sodium have the tight clustered based on the periodic table.

It mainly involves with highest-energy electron is in the S-orbital shell.

This configuration explains, in part, why these elements are so very reactive.

MG, CA and SR Elements have same valence of 2. mg=2, 8 , 2 ca= 2, 8, 8, 2  sr= 2 , 8, 8