The name of the most abundant gas in the Earth's atmosphere is nitrogen (N2), comprising approximately 78% of the atmosphere. Nitrogen is a key component of the nitrogen cycle and plays an essential role in biological processes, including the synthesis of amino acids and nucleic acids. While it is relatively inert and does not readily react, it is crucial for life on Earth. Understanding nitrogen's role in the atmosphere is important for fields such as environmental science, agriculture, and ecology, particularly regarding its impact on ecosystems and agricultural practices.