Question

On the basis of electronic configuration of ,9X5, the group suber andperiod of the element X' is:(a) Group 15 period 2(b) Group 18 period 2(c) Group 9 period 5(d) Group 13 period 5ORAn element 'X' with atomic number 11 forms a compound with element Twith atomic number 8. The formula of the compound formed is(a) XY(b) X Y(c) XY,(d) X Y11h11​

Answer 1

Answer:

⁹X₅ is boron atomic no. and belongs to  group 13 period 2

X has atomic no. 11 [Na] valency=1

Y has atomic no. 8 [O] valency=2

compound formed by X and Y is X₂Y