The name for NH4NO3 isammonium nitrate.ammonium nitrogen trioxide.ammonia nitrogen oxide.hydrogen nitrogen oxide.hydrogen nitrate.

The correct name for the chemical formula $\text{NH}_4\text{NO}_3$ is ammonium nitrate.

Explanation:

1. Structure: $\text{NH}_4$ is the ammonium ion, while $\text{NO}_3$ is the nitrate ion.
2. IUPAC Naming: In accordance with IUPAC naming conventions, when combining cations (positively charged ions) and anions (negatively charged ions), the names are derived from the ions present in the compound.
3. Other Options:
   • "Ammonium nitrogen trioxide" incorrectly suggests a different composition.
   • "Ammonia nitrogen oxide" does not accurately describe the compound's structure.
   • "Hydrogen nitrogen oxide" and "hydrogen nitrate" are also incorrect as they do not reflect the actual ions present.

Thus, the accurate and accepted name for $\text{NH}_4\text{NO}_3$ is ammonium nitrate.