1. Identify the Charges:

* Barium (Ba) has a +2 charge (Ba²⁺)

* Nitrogen (N) has a -3 charge (N³⁻)

2. Find the Least Common Multiple:

* The least common multiple of 2 and 3 is 6.

3. Determine the Number of Ions:

* To achieve a +6 charge, you need 3 barium ions (3 Ba²⁺ = +6)

* To achieve a -6 charge, you need 2 nitrogen ions (2 N³⁻ = -6)

4. Write the Formula:

* The chemical formula for barium nitride is Ba₃N₂.