The table gives the number of electrons in a single atom of each element W, X, Y and Z. W: 9; X: 15; Y: 19; Z: 35. Which of these statements is correct?
- AW and Z are in the same group.
- BX is a metal.
- CX and Y will form the compound $\text{X}_3\text{Y}$.
- DY is a non-metal.