Question

Element X forms a chloride with a formula XCl2 which is a solid with high melting point. X would most likely in the same group of the periodic table as:
A. Na
B. Cr
C. Mg
D. Xe​

Answer 1

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I think option c mg

Answer 2

(c)$\large\tt\blue{Magnesium (Mg)}$

Because Mg has the valency 2 which is same as the group (a) Na (b) Mg (c) AI (d) Si

Also Mg when combines chloride forms MgCl2.