Question

On the basis of electronic configuration of ,9X5, the group suber and
period of the element X' is:
(a) Group 15 period 2
(b) Group 18 period 2
(c) Group 9 period 5
(d) Group 13 period 5
OR
An element 'X' with atomic number 11 forms a compound with element T
with atomic number 8. The formula of the compound formed is
(a) XY
(b) X Y
(c) XY,
(d) X Y
11h11​

Answer 1

Answer:

XY2

EXPLANATION :-

becaue ● atomic no 11 electronic conf 2 ,8,1 ●atomic no 8 electronic conf 2 ,6 now for forming compound

becaue ● atomic no 11 electronic conf 2 ,8,1 ●atomic no 8 electronic conf 2 ,6 now for forming compound outermost electron of x and y should be criss multipled

ie x×x1Y2

ie x×x1Y2XY2