Answer: NH₄NO₃
Step-by-step explanation:
The ammonium ion formula is NH₄¹⁺
The nitrate ion formula is NO₃¹⁻
When writing formulas for ionic compounds, use the "swap and drop" method. Swap the charge numbers and then drop those numbers as subscripts for each ion in the formula.
NH₄¹⁺ NO₃¹⁻
Both charges are 1 for each polyatomic ion. The formula is NH₄NO₃.