Question

Element X forms a chloride with the formula $XCl_2$, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as -

• A. Na
• B. Mg
• C. Al
• D. Si

Answer 1

Answer: (B)

Mg

Answer 2

Elements of group Na form XCl halide. Elements of group $Mg$ form $XCl _{2}$ halide. Elements of group $Al$ form $XCl _{3}$ halide. Elements of group $Si$ form $XCl _{4}$ halide. As an element, $X$ forms a chloride with the formula $XCl _{2}$, which is solid with a high melting point. $X$ would most likely be in the same group of $Mg$.