MgCl2 doesn't stand for anything in the table of elements. It's a chemical formula, not an element.

Here's what it represents:

* Mg: Magnesium, a chemical element with the symbol Mg and atomic number 12.

* Cl: Chlorine, a chemical element with the symbol Cl and atomic number 17.

* 2: Indicates that there are two chlorine atoms for every one magnesium atom in the compound.

Therefore, MgCl2 represents the compound Magnesium Chloride.