Which of the following ions has the formula NO3(-)?

The ion with the formula NO3(-) is known as nitrate. Nitrate is a polyatomic ion composed of one nitrogen atom bonded to three oxygen atoms, and it carries a negative one charge. This specific combination is significant in various chemical contexts, such as in fertilizers and environmental science, due to its role as a nutrient for plants.

In contrast, the other options represent different ions with distinct formulas and compositions. Carbonate, for example, has the formula CO3(2-), consisting of one carbon atom and three oxygen atoms, and carries a negative two charge. Thiocyanate, on the other hand, is represented as SCN(-), which combines sulfur, carbon, and nitrogen. Lastly, cyanate has the formula OCN(-), where the structure features one carbon and one nitrogen atom with an oxygen atom.

Understanding these distinctions in chemical formulas is crucial as it directly impacts the chemical behavior and reactivity of the compounds they form. In this case, recognizing the specific characteristics of nitrate as NO3(-) leads to identifying it correctly amidst other similar-sounding ions.