Question

The electronic configuration of the elements a b c and d are given below. A=2, 3 B= 2, 6 C=2, 8, 18, 4. D=2,8,3..
1) which elements are belongs to same group
2) which elements are belongs to same period

Answer 1

1) Element A and D belong to the same group  ( since they have same number of valence electrons in the outermost shell) 2) element A and B belong to the same period  ( since they have the same number of shells, that is 2) **************************************************************************************************************** Hope this helps

Answer 2

1 C and D element belongs to same group
2 A and B element belongs to same period