The covalent alkaline earth metal halide ` ( X = Cl, Br, I )` is :

Options

A. `CaX_2`
B. `SrX_2`
C. `BeX_2`
D. `MgX_2`

Answer

C

Explanation

According to Fajan.s rule when size of cation decrease, then covalent character increase. So `BeX_2` is covalent in nature.