The formula for the nitrate ion is NO3–.
In this formula, the ‘N’ stands for nitrogen, and the ‘O’ represents oxygen. The nitrate ion consists of one nitrogen atom bonded to three oxygen atoms. The negative one charge (indicated by the ‘−’) signifies that the nitrate ion carries a negative charge, making it an anion. This ion is commonly found in various chemical compounds, particularly in fertilizers, and plays a significant role in the nitrogen cycle within ecosystems.