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Britannica Sources used in this answer

How much of Earth’s atmosphere is made of nitrogen gas?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram of a periodic table entry for nitrogen shows its atomic number 7, symbol N, electron configuration, atomic weight, and name. Symbols indicate nitrogen is a nonmetal gas at room temperature, has a hexagonal crystal structure, and strongly acidic higher-valence oxides. A key explains the diagram's icons and color coding.
nitrogen

Earth’s atmosphere consists of 78.09 percent nitrogen by volume (or 75.51 percent by weight). This gas serves as the principal source of nitrogen for commerce and industry.1