element x forms a chloride with the formula which is solid with a high melting point.x would most likely to be in the same group of the periodic table
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From the formula XCl2 we see that one atom of X combines with 2 atoms of Cl this means X has a valency of 2 just like Magnesium. (Remember the formula of magnesium chloride is MgCl2).
Na has valency 1 (NaCl)
Al has valency 3 (AlCl3)
Si has valency 4 (SiCl4)
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