Question

An element X with atomic number 12 forms a compound with element Y
with atomic number 17. The formula of the compound formed is
(A) XY
(B) XYZ
(C) X Y
(D) X2Y3​

Answer 1

D is the answer maybe

Answer 2

X=2,8,2

Y=2,8,7

(X)2=Y(1)

This may help you friends.......

ans:b. X(Y)2