Friday, 27 November 2020 10:32 AM
Elements of group Na form XCl halide.
Elements of group Mg form XCl2? halide.
Elements of group Al form XCl3? halide.
Elements of group Si form XCl4? halide.
As an element, X forms a chloride with the formula XCl2?, which is solid with a high melting point. X would most likely be in the same group of Mg.