Question

Determine the group number and period of element with atomic number 38

Answer 1

Group -2
Period-5
Element-strontium

Answer 2

First we'll write electronic configuration
38 = 2,8,18,8,2
We know that valence electrons show the number of group so this belongs to group 2 or II A.
The number of shells represent the period number so it belongs to 5th period.
Thanks.