Final answer:
The balanced chemical equation for the conversion of magnesium phosphide into its constituent elements is Mg₃P₂ → 3Mg + 2P (option A).
Step-by-step explanation:
The correct balanced chemical equation for the conversion of magnesium phosphide into its constituent elements is Mg₃P₂ → 3Mg + 2P (option A).
In this reaction, Mg₃P₂ breaks down into 3 atoms of magnesium (3Mg) and 2 atoms of phosphorus (2P).
It is important to note that in a balanced chemical equation, the number of atoms of each element must be the same on both sides of the equation.