It is a molecular (covalent) compound. Present day text books refer to a covalent compound as a molecular compound, as opposed to an ionic one.
For phosphorus trioxide, P2O3 formula unit, P4O6 molecular formula
Ionic Molecular
PtO2 is ionic
Molecular
molecular
Sodium Chloride is an ionically bonded molecule. Na^(+) + Cl^(-) = NaCl(s).
ionic
it is ionic
It is molecular
Molecular compound
You misunderstand. !!!! Magnesium is an ELEMENT. As an element it exists as atoms in a metallic lattice. When combined with another element e.g. oxygen as magnesium oxide, (MgO), then it is an ionically bonded molecular compound. Mg^(2+) + O^(2-) = MgO(s)
A molecular covalent compound