What is the resulting formula unit when magnesium (mg) and nitrogen (n) bond?

Mg₃N₂.

Explanation:

Mg is an element of group (II A) in the periodic table.It has atomic number (12) and its electronic configuration is (1s²2S²2p⁶3s²), it has 2.0 electrons in the valence level of electrons.N is an element of group (V A) in the periodic table.It has atomic number (7) and its electronic configuration is (1s²2S²2p³), it has 5.0 electrons in the valence level of electrons.According to octet rule, Mg can lose 2.0 electrons and N can gain 3.0 electrons to be stable.So, the resulting formula unit when magnesium (Mg) and nitrogen (N) bond is Mg₃N₂.