Question

how to drive the formula of magnesium chloride

Answer 1

magnesium gives up two electrons when it reacts so it has a charge of +2. Chlorine takes in one electron so it has a charge of -1. We need two chlorine atoms to take those two electrons from magnesium (which cancels out the overall charge 2-1-1=0). MgCl2

Answer 2

Hey dear here is your answer!!!!

*To derive a formula :-

Mg^+2. Cl^-1

On cross multiplication of powers

MgCl2
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Hope it helps u dear....☺️☺️☺️