Question

32) In the synthesis reaction of magnesium and chlorine, two chlorine atoms react with one magnesium atom to form the ionic compound, MgCl2. What is the best explanation for this reaction?

Answer 1

Explanations:- Chlorine is a diatomic element and so it's written as $Cl_2$ ,  The balanced equation for the synthesis reaction of magnesium and chlorine to form magnesium chloride is written as:

$Mg+Cl_2\rightarrow MgCl_2$

One chlorine molecule has two Cl atoms, So, at atomic level, we could say that one magnesium atom reacts with two atoms of chlorine or we could say that one atom of magnesium react with one molecule of chlorine ($Cl_2$) .