Essential Chemistry for IGCSE - Formulae And Equations (Section 4 - No. 32)

Which of the following correctly represents the formula for magnesium chloride?

MgCl

MgCl2

Mg2Cl

Mg2Cl2

Magnesium has a +2 charge, and chlorine has a -1 charge. Thus, we need two chlorine atoms to balance magnesium.