Two Period 3 elements, X and Y, each react separately with oxygen to produce solid oxides. The oxide of X does not dissolve in water. The oxide of Y dissolves in water, giving a solution that can dissolve the oxide of X. What could X and Y be?
- AX: aluminium; Y: sodium
- BX: magnesium; Y: sodium
- CX: silicon; Y: phosphorus
- DX: silicon; Y: sulfur