# Why is magnesium oxide the likely product of combustion of magnesium in air rather than magnesium nitride?

Combustion of magnesium metal in air leads exclusively to $\text{magnesium oxide}$.
While $\text{magnesium nitride}$ is a possibility, and may even be more thermodynamically favourable than $M g O$, there is a kinetic barrier to the formation of the nitride, i.e. cleavage of the strong $N \equiv N$ bond.