The accepted IUPAC name for the compound Mg3P2 is magnesium phosphide.
Magnesium phosphide is an inorganic compound composed of magnesium (Mg) and phosphorus (P). In this compound, three magnesium atoms bond with two phosphorus atoms. The naming follows the IUPAC convention where the name of the metal (magnesium) is followed by the name of the non-metal (phosphide), which is derived from phosphorus. The ‘phosphide’ indicates that phosphorus is in its -3 oxidation state, which is typical for phosphorus when it forms ionic compounds with metals like magnesium.