Question

Q 9. An element X from group 2
of the Periodic Table reacts with
Y from group 17 to form a
compound. Give the formula of
the compound. *
(a) XY2
(b) XY
O O O O
(c) X Y
(d) (XY)2​

Answer 1

Answer:

XY2. group 2 charge is +2,group 17 charge is -1.if we do criss cross by using above charges we get XY2