N-14 is a stable isotope of nitrogen, which is represented by the symbol N. It has a nucleus containing seven protons and seven neutrons. This isotope is commonly found in nature and plays a crucial role in various biological processes, including the nitrogen cycle, where it helps in the formation of amino acids and proteins. In addition to its biological significance, N-14 is also used in scientific research and applications. For instance, it can be utilized in radiocarbon dating to help determine the age of organic materials. Its stable nature makes it an important reference point in studies involving isotopic compositions.