Question

what is the formula for the ionic compound containing sodium ions and nitride ions?
○ nan
○ na₂n
○ nna₂
○ na₃n
○ nna₃

Explanation:

Step1: Determine ion charges

Sodium ion is \( \text{Na}^+ \) (charge +1), nitride ion is \( \text{N}^{3-} \) (charge -3).

Step2: Balance charges

To balance positive and negative charges, we need 3 \( \text{Na}^+ \) ions (total +3) to balance 1 \( \text{N}^{3-} \) ion (total -3).

Step3: Write formula

The formula is \( \text{Na}_3\text{N} \) (matching the option "Na₃N").

Answer:

Na₃N (the option labeled "Na₃N")