Here's how to determine the number of nitrogen atoms in ammonium carbonate:

1. Chemical Formula:

* Ammonium carbonate has the chemical formula (NH₄)₂CO₃

2. Breakdown of the Formula:

* (NH₄)₂: This represents two ammonium ions (NH₄⁺).

* CO₃: This represents one carbonate ion (CO₃²⁻).

3. Counting Nitrogen Atoms:

* Each ammonium ion (NH₄⁺) contains one nitrogen atom.

* Since there are two ammonium ions, there are a total of 2 * 1 = 2 nitrogen atoms in ammonium carbonate.

Therefore, there are two nitrogen atoms in ammonium carbonate.