What is the formula of the ionic compound formed when calcium and nitrogen react together?

A.     \({\text{C}}{{\text{a}}_{\text{2}}}{{\text{N}}_{\text{3}}}\)

B.     \({\text{C}}{{\text{a}}_{\text{3}}}{{\text{N}}_{\text{2}}}\)

C.     \({\text{C}}{{\text{a}}_{\text{5}}}{{\text{N}}_{\text{2}}}\)

D.     \({\text{C}}{{\text{a}}_{\text{2}}}{{\text{N}}_{\text{5}}}\)

B