Question

Two elements showing similar properties due to same number of valence electrons are :
1) Ca and Ga
2) S and O
3) C and Cl
4) Si and S

Answer 1

Sulphur (S) and oxygen (O) have same number of valence electron

Electronic configuration of S and O
S- K= 2 , L = 8 , M = 6
O- K= 2 , L = 6

Hence, the valence shell of both the element is 6

Answer 2

The two elements are:

Sulphur & Oxygen.

Both have a valency 2-.

Both have 6 electrons in their Valance shell or the Outermost shell.

Hope it helps............