MCQ
Two elements $X$ and $Y$have following electronic configurations $X = 1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^2}3{p^6},\,\,4{s^2}$ and $Y = 1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^2}3{p^5}$. The expected compound formed by combination of $X$ and $Y$ is
- ✓$X{Y_2}$
- B${X_5}{Y_2}$
- C${X_2}{Y_5}$
- D$X{Y_5}$