Answer:
Option E is correct.
Explanation:
An atom of magnesium and two atoms of chloride react and yield the compound of magnesium chloride
Mg + 2Cl -> MgCl₂
Therefore, the correct option is the option E.
Option A shows the decomposition of MgCl₂ to two Mg atom and 1 Cl atom. The reaction is unbalanced. The question has asked for the formation of MgCl₂. Option A is incorrect.
Similarly, option C shows the decomposition of MgCl₂, however, the reaction is balanced. Option C is incorrect.
Option B is incorrect as there are 2 Cl atoms on the reactant side but no Mg atom.
Option D is incorrect as there only 1 Mg atom on the reactant side but no Cl atoms.
