Question

2. On the basis of electronic configuration of X, the group number and
period of the element 'X' is :
(a) Group 15 period 2
(b) Group 13 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 Y
with atomic number 8. The formula of the compound formed is
(a) XY
(b) X,Y
(©) XY,
(d) X,Y,​

Answer 1

Answer:

Na2O2 is formed mainly but Na2O can also be formed.

Answer 2

Answer:

OR

ANSWER IS X2Y OR NA20