What is the formula of magnesium nitride?

A.     \({\text{M}}{{\text{g}}_{\text{2}}}{{\text{N}}_{\text{3}}}\)

B.     \({\text{M}}{{\text{g}}_{\text{3}}}{{\text{N}}_{\text{2}}}\)

C.     \({\text{Mg(N}}{{\text{O}}_{\text{3}}}{{\text{)}}_{\text{2}}}\)

D.     \({\text{Mg(N}}{{\text{O}}_{\text{2}}}{{\text{)}}_{\text{2}}}\)

B