Question

2 what is the formula for barium nitride? ban₂ ban ba₃n₂ ba₂n₃ clear all

Explanation:

Step1: Determine the charges

Barium (\(Ba\)) is in group 2 of the periodic table, so it has a charge of \(+2\) (\(Ba^{2+}\)). Nitrogen (\(N\)) is in group 15, and as a nitride ion, it has a charge of \(-3\) (\(N^{3 -}\)).

Step2: Use the criss - cross method

To form a neutral compound, we use the criss - cross method. The magnitude of the charge of one ion becomes the subscript of the other ion.
For \(Ba^{2+}\) and \(N^{3 -}\), the formula is \(Ba_3N_2\) because \(2\times3 = 3\times2\) (to balance the charges: \(3\times(+ 2)+2\times(-3)=6 - 6 = 0\)).

Answer:

\(Ba_3N_2\) (the option \(Ba_3N_2\) is correct)