The chemical element with the symbol "N" is nitrogen. It is a colorless, odorless gas that makes up approximately 78% of the Earth's atmosphere. Nitrogen is essential for life as it is a crucial component of amino acids, nucleic acids, and proteins, contributing to all forms of life. It is commonly found in various compounds, including fertilizers, which are vital for agriculture. Nitrogen is also a key player in numerous industrial processes, such as the production of ammonia through the Haber process. Due to its inert nature under normal conditions, elemental nitrogen does not easily react, making it a stable and essential element in various ecosystems.