* Identify the elements: Barium (Ba) and Nitrogen (N)
* Determine the charges: Barium is in group 2, so it has a +2 charge (Ba²⁺). Nitrogen is in group 15, so it has a -3 charge (N³⁻).
* Balance the charges: To have a neutral compound, you need 3 barium ions (3 x +2 = +6) and 2 nitride ions (2 x -3 = -6).
* Write the formula: The chemical formula for barium nitride is Ba₃N₂.
