The primary gas element in air is nitrogen, which makes up about 78% of the Earth's atmosphere. Oxygen, the second most abundant gas, comprises approximately 21%, while other gases such as argon, carbon dioxide, and trace gases account for the remaining 1%. Nitrogen is crucial for life, serving as a fundamental building block in the synthesis of amino acids and proteins. Although it is chemically inert under standard conditions, it plays a vital role in various biological and ecological processes. The balance of gases in the atmosphere is essential for sustaining life on Earth, as well as for weather patterns.